ICC Class DF Fire Suppression Installation Contractor - G35-N Exam Book Package Guide

The ICC Class DF Fire Suppression Installation Contractor - G35-N examination is intended for fire protection professionals preparing to demonstrate their knowledge of water-based fire suppression systems, automatic sprinklers, standpipes, hose systems, fire pumps, water supplies, system components, acceptance testing, inspection, maintenance, building-code requirements, and fire-code responsibilities.

The ICC Class DF Fire Suppression Installation Contractor - G35-N Exam Book Package brings together fire protection codes and standards selected to support organized, book-based exam preparation.

The package is listed at a sale price of $1,495.00, reduced from the regular price of $1,595.00.

This guide explains the package contents, major G35-N study areas, fire suppression contractor responsibilities, sprinkler and standpipe concepts, fire pump requirements, system testing, reference-book navigation, and practical preparation strategies.

ICC Class DF Fire Suppression Installation Contractor - G35-N Exam Book Package

The ICC Class DF Fire Suppression Installation Contractor - G35-N Exam Book Package is designed for candidates who prefer preparing directly from printed fire protection codes and standards.

Fire suppression installation requires candidates to connect building and fire-code requirements with detailed standards for sprinklers, standpipes, fire pumps, water supplies, valves, alarms, acceptance testing, inspection, maintenance, and system impairments.

The package is listed at a sale price of $1,495.00, reduced from the regular price of $1,595.00.

This package may be appropriate for candidates who:

• Prefer studying from printed technical materials
• Need the building code, fire code, and NFPA standards in one package
• Want to practice open-book reference navigation
• Already have sprinkler-fitting or fire protection experience
• Need to strengthen their knowledge of standpipes and fire pumps
• Want professional books that remain useful after the examination
• Are preparing for the ICC G35-N examination path

What Is Included in the G35-N Exam Book Package?

The current package listing identifies the following references:

• 2018 International Building Code
• 2018 International Fire Code
• NFPA 13: Standard for the Installation of Sprinkler Systems, 2016 Edition
• NFPA 14: Standard for the Installation of Standpipe and Hose Systems, 2016 Edition
• NFPA 20: Standard for the Installation of Stationary Pumps for Fire Protection, 2016 Edition
• NFPA 25: Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, 2017 Edition

These books support preparation involving automatic sprinkler systems, standpipes, hose connections, fire department connections, stationary fire pumps, system water supplies, valves, alarms, acceptance tests, system impairments, inspection, testing, maintenance, and fire protection requirements within buildings.

Candidates should verify the exact editions and approved book list before ordering or registering because examination requirements may vary by jurisdiction and code cycle.

What Is the ICC G35-N Examination?

The G35-N examination is associated with the ICC Contractor and Trades testing program and the Class DF Fire Suppression Installation Contractor classification.

Participating licensing authorities may use the examination to evaluate whether a contractor or qualifying individual understands the installation and code requirements associated with water-based fire protection systems.

Preparation may include questions involving:

• Automatic sprinkler system installation
• Standpipe and hose systems
• Stationary fire pumps
• Water supplies
• Fire department connections
• Valves and supervisory equipment
• System acceptance testing
• Inspection and maintenance requirements
• Building-code fire protection provisions
• Fire-code operational requirements
• Contractor responsibilities
• System documentation

Candidates should confirm the current examination format, approved references, testing time, passing requirement, and book-marking rules through ICC and the licensing authority requiring the examination.

Confirm the Licensing Authority’s Requirements

Passing an ICC Contractor and Trades examination does not automatically issue a fire suppression contractor license in every jurisdiction.

Before purchasing books or scheduling the examination, candidates should verify:

• The exact examination title and identifier
• Whether the authority accepts G35-N
• The applicable contractor classification
• The approved code and standard editions
• The examination format
• The testing time
• The passing-score requirement
• Whether the exam is open book
• Permitted tabs, highlights, and notes
• Required fire protection work experience
• Required supervisory experience
• Financial or insurance requirements
• Application and examination fees
• Renewal and continuing-education requirements

Confirming these details helps candidates avoid studying for an incorrect exam or using materials from the wrong code cycle.

What Does a Fire Suppression Installation Contractor Do?

A fire suppression installation contractor installs, alters, repairs, and services fire protection systems within the scope allowed by the applicable license or registration.

Common responsibilities may include:

• Reviewing approved fire protection plans
• Coordinating system installation with other trades
• Installing automatic sprinkler piping
• Installing sprinkler heads and fittings
• Installing standpipes and hose connections
• Installing control valves and check valves
• Installing fire department connections
• Installing fire pumps and related piping
• Connecting system alarm and supervisory devices
• Conducting required flushing and pressure tests
• Participating in acceptance testing
• Correcting installation deficiencies
• Maintaining installation records
• Coordinating inspections with the authority having jurisdiction
• Following impairment and safety procedures

The exact work permitted depends on the contractor classification and the requirements of the licensing jurisdiction.

Understanding Water-Based Fire Protection Systems

Water-based fire protection systems are designed to control or suppress fires, protect building occupants and property, and support fire department operations.

Common system categories include:

• Wet-pipe sprinkler systems
• Dry-pipe sprinkler systems
• Preaction sprinkler systems
• Deluge systems
• Standpipe systems
• Combined sprinkler and standpipe systems
• Fire pump systems
• Private fire service mains
• Water storage tanks
• Foam-water systems where included by the approved design

Candidates should understand the purpose, operating sequence, components, installation limitations, and testing requirements associated with each applicable system.

How the Six References Work Together

A major part of G35-N preparation is learning which reference applies to each question.

• Use the 2018 International Building Code for building occupancy, construction, height and area, required fire protection systems, and relationships between building features and fire suppression requirements.
• Use the 2018 International Fire Code for permits, operational requirements, system acceptance, impairments, maintenance, fire department access, and ongoing fire-safety responsibilities.
• Use NFPA 13 for automatic sprinkler system design and installation requirements.
• Use NFPA 14 for standpipe and hose system installation requirements.
• Use NFPA 20 for stationary fire pumps, drivers, controllers, piping, and pump-room arrangements.
• Use NFPA 25 for inspection, testing, maintenance, and impairment procedures for existing water-based systems.

Before searching a book, candidates should identify whether the question concerns a building requirement, fire-code responsibility, sprinkler installation, standpipe system, fire pump, or ongoing system maintenance.

2018 International Building Code

The International Building Code establishes requirements for building construction and identifies situations in which fire protection systems may be required.

Important preparation areas may include:

• Occupancy classifications
• Types of construction
• Building height and area
• Mixed occupancies
• Fire areas
• Automatic sprinkler requirements
• Standpipe requirements
• Fire pump considerations
• High-rise building requirements
• Underground buildings
• Atriums
• Incidental uses
• Fire-resistance-rated construction
• Means of egress relationships
• Special building features

Candidates should understand that the IBC often determines when a system is required, while the referenced NFPA standard explains how that system must be installed.

2018 International Fire Code

The International Fire Code addresses fire prevention, operational permits, fire protection systems, emergency access, hazardous conditions, system impairments, inspections, and ongoing maintenance responsibilities.

Important study areas may include:

• Fire protection system permits
• System acceptance requirements
• System maintenance
• System impairments
• Fire department connections
• Fire command centers
• Fire department access
• Fire hydrants and water supplies
• Records and documentation
• Hazardous operations
• High-piled storage
• Special occupancy conditions
• Owner and contractor responsibilities
• Testing and inspection coordination

Candidates should learn when the IFC provides the controlling requirement and when it sends the user to an NFPA installation or maintenance standard.

NFPA 13 Sprinkler System Installation

NFPA 13 is the primary installation standard in the package for automatic sprinkler systems.

Important study subjects may include:

• System types
• Occupancy hazard classifications
• Sprinkler types
• Sprinkler temperature ratings
• Sprinkler positioning
• Sprinkler spacing
• Obstructions to sprinkler discharge
• Piping materials
• Pipe joining methods
• Pipe support and restraint
• Valves and trim
• Water supplies
• Hydraulic design concepts
• System acceptance testing
• Plans and calculations

Candidates should become familiar with NFPA 13 definitions, tables, figures, occupancy classifications, installation chapters, and system-specific requirements.

Wet-Pipe Sprinkler Systems

A wet-pipe system contains water under pressure throughout the sprinkler piping during normal service.

Important study areas may include:

• System control valves
• Check valves
• Waterflow alarm devices
• Inspector’s test connections
• Main drains
• Auxiliary drains
• Pressure gauges
• Fire department connections
• Sprinkler orientation
• Piping pitch where required
• Hydrostatic testing
• Flushing
• System signage

Wet-pipe systems are generally straightforward, but candidates must still understand valve arrangements, alarms, drainage, testing, and protection from freezing.

Dry-Pipe Sprinkler Systems

A dry-pipe system contains pressurized air or nitrogen in the piping. Water enters the system after a sprinkler operates and the dry-pipe valve opens.

Study subjects may include:

• Dry-pipe valves
• Air or nitrogen supplies
• System capacity
• Water-delivery time
• Accelerators and exhausters
• Piping pitch
• Low-point drains
• Auxiliary drains
• Air-pressure supervision
• Valve-room temperature
• Trip testing
• System restoration
• Corrosion concerns

Candidates should understand how dry-pipe systems differ from wet-pipe systems and why drainage and air-pressure control are especially important.

Preaction Sprinkler Systems

A preaction system generally requires a separate detection event before water enters the sprinkler piping.

Important preparation areas may include:

• Single-interlock systems
• Double-interlock systems
• Non-interlock systems
• Detection systems
• Releasing equipment
• Preaction valves
• Supervised air pressure
• Water-delivery requirements
• System monitoring
• Testing procedures
• System restoration
• Protection of sensitive occupancies

Candidates should identify the operating sequence described in the question before selecting the applicable requirement.

Deluge Systems

A deluge system uses open sprinklers or nozzles connected to piping controlled by a deluge valve. When the detection system operates, water is admitted to all discharge devices.

Study areas may include:

• Open sprinklers or nozzles
• Deluge valves
• Detection and releasing systems
• System activation
• Water supplies
• Discharge patterns
• System drainage
• Acceptance testing
• System restoration
• Special hazard applications

Deluge questions may require candidates to distinguish the open-discharge arrangement from systems that use individually heat-operated sprinklers.

Occupancy Hazard Classification

Sprinkler system requirements are influenced by the occupancy hazard classification and the expected quantity, arrangement, and combustibility of materials.

Common classification areas may include:

• Light hazard occupancies
• Ordinary hazard occupancies
• Extra hazard occupancies
• Storage occupancies
• Special occupancy hazards
• Mixed hazard areas
• Small higher-hazard rooms
• Changes in building use

Candidates should avoid classifying a space by its building name alone. The actual use, fuel load, operations, and storage arrangement may control the classification.

Sprinkler Types and Temperature Ratings

Sprinklers are selected according to their listing, orientation, response characteristics, temperature rating, discharge pattern, and intended application.

Study subjects may include:

• Upright sprinklers
• Pendent sprinklers
• Sidewall sprinklers
• Standard-response sprinklers
• Quick-response sprinklers
• Residential sprinklers
• Extended-coverage sprinklers
• Storage sprinklers
• Dry-type sprinklers
• Corrosion-resistant sprinklers
• Temperature classifications
• Intermediate and high-temperature areas
• Sprinkler guards and shields

The contractor should verify that the installed sprinkler matches the approved plan, listing, orientation, and environmental conditions.

Sprinkler Location and Spacing

Sprinkler position affects the ability of the discharge pattern to reach and control a fire.

Inspection and exam subjects may include:

• Maximum sprinkler spacing
• Maximum coverage area
• Distance from walls
• Minimum spacing between sprinklers
• Distance below ceilings
• Ceiling configuration
• Beams and structural members
• Cloud ceilings
• Sloped ceilings
• Concealed spaces
• Obstructions
• Changes in elevation
• Storage clearance

Candidates should read the entire installation condition because spacing and obstruction rules can depend on sprinkler type and ceiling construction.

Obstructions to Sprinkler Discharge

Structural members, ducts, lights, pipes, cable trays, shelving, equipment, and architectural features may obstruct sprinkler discharge.

Study areas may include:

• Continuous obstructions
• Individual obstructions
• Obstructions below sprinklers
• Wide structural members
• Ductwork
• Open-grid ceilings
• Overhead doors
• Storage racks
• Canopies
• Clouds and ceiling panels
• Sprinklers above and below obstructions
• Permitted distances

Candidates should learn how to identify the obstruction type before applying the applicable positioning rule.

Sprinkler Piping Materials

Sprinkler piping and fittings must be listed or approved for the system and installed according to the applicable standard and manufacturer requirements.

Study subjects may include:

• Steel pipe
• Copper tube
• Listed nonmetallic pipe
• Pipe schedules
• Pressure ratings
• Corrosion resistance
• Threaded joints
• Grooved joints
• Welded joints
• Soldered or brazed joints
• Listed fittings
• Underground piping transitions
• Protection from mechanical damage

Candidates should identify the material and joining method described before selecting the applicable installation requirement.

Pipe Supports, Hangers, and Restraint

Sprinkler and standpipe piping must be supported to carry system weight, resist movement, and maintain alignment during normal service and expected building conditions.

Study areas may include:

• Hanger spacing
• Hanger locations
• Support from structural members
• Trapeze hangers
• Branch-line restraint
• Seismic bracing
• Longitudinal bracing
• Lateral bracing
• Flexible couplings
• Clearance around penetrations
• Riser support
• Protection from displacement

Candidates should distinguish ordinary pipe support requirements from seismic bracing and restraint requirements.

Valves and System Control

Fire suppression systems use control, alarm, check, pressure-regulating, and test valves to manage water flow and system operation.

Important study areas may include:

• Indicating control valves
• Alarm check valves
• Dry-pipe valves
• Deluge valves
• Preaction valves
• Backflow prevention assemblies
• Pressure-reducing valves
• Pressure-relief valves
• Check valves
• Test and drain valves
• Sectional control valves
• Valve supervision
• Valve identification signs
• Access and clearance

The contractor should confirm that valves are installed in the correct orientation, accessible for operation, properly supervised, and identified.

Water Supplies

A fire suppression system must have a water supply capable of supporting the required system demand for the required duration.

Possible water supplies may include:

• Public water systems
• Private water mains
• Gravity tanks
• Pressure tanks
• Suction tanks
• Reservoirs
• Fire pumps
• Combined water supplies
• Secondary water supplies

Study subjects may include available pressure, available flow, system demand, duration, elevation, friction loss, supply reliability, and the effect of valves or backflow assemblies.

Waterflow Testing

Waterflow testing helps establish the pressure and flow available from a water supply.

Study considerations may include:

• Static pressure
• Residual pressure
• Flowing pressure
• Flow hydrants
• Test hydrants
• Pitot readings
• Outlet coefficients
• Elevation differences
• Test dates
• System changes
• Water utility coordination
• Test documentation

Candidates should understand the difference between static and residual pressure and how water supply test information supports system evaluation.

Fire Department Connections

A fire department connection allows responding fire personnel to supplement the water supply serving a sprinkler or standpipe system.

Study areas may include:

• Connection type
• Number and size of inlets
• Location
• Accessibility
• Visibility
• Identification signs
• Check valves
• Drainage
• Connection piping
• Protection from damage
• Clearance from obstructions
• Coordination with the fire department

The fire department connection should be installed where responding personnel can identify and use it effectively.

Alarm and Supervisory Devices

Water-based fire suppression systems often include devices that indicate waterflow, valve position, pressure conditions, or system trouble.

Study subjects may include:

• Waterflow switches
• Alarm check valves
• Mechanical water-motor gongs
• Pressure switches
• Valve supervisory switches
• Low-air-pressure switches
• Low-temperature alarms
• Fire pump running signals
• Pump controller trouble signals
• Tank-level supervision
• Signal testing
• Coordination with fire alarm systems

Candidates should understand the difference between an alarm signal, supervisory signal, and trouble signal.

NFPA 14 Standpipe and Hose Systems

NFPA 14 provides installation requirements for standpipe and hose systems used to support manual firefighting operations.

Important study areas may include:

• Standpipe system classes
• Wet and dry standpipes
• Automatic and manual systems
• Semiautomatic systems
• Combined systems
• Hose connection locations
• Pressure requirements
• Flow requirements
• Pressure-regulating devices
• Fire department connections
• Water supplies
• Acceptance testing
• System identification

Candidates should identify the standpipe class and system type before applying the installation requirement.

Standpipe System Classes

Standpipe classes are based on the type of hose connection and intended users.

Preparation should include:

• Class I systems
• Class II systems
• Class III systems
• Fire department hose connections
• Occupant-use hose stations where applicable
• Combined connection arrangements
• Required outlet sizes
• Hose connection identification

Candidates should not confuse the standpipe class with whether the system is automatic, manual, wet, or dry.

Standpipe System Types

Standpipe systems may be classified according to whether water is present in the piping and how the water supply is delivered.

Possible system types include:

• Automatic wet systems
• Automatic dry systems
• Semiautomatic dry systems
• Manual wet systems
• Manual dry systems
• Combined sprinkler and standpipe systems

Each type has different water-supply, valve, operational, testing, and fire department connection considerations.

Hose Connection Locations

Standpipe hose connections must be located so firefighters can reach required areas while operating from protected or accessible positions.

Study areas may include:

• Exit stairways
• Intermediate landings
• Horizontal exits
• Smokeproof enclosures
• Roof access
• High-rise buildings
• Covered and open malls
• Parking structures
• Stages and special areas
• Travel-distance limitations
• Outlet height
• Access and visibility

Candidates should compare the building configuration with the applicable placement requirement.

Standpipe Pressure and Flow

Standpipe systems must provide the required flow and pressure at the hydraulically remote hose connections.

Preparation may include:

• Required system flow
• Flow from the most remote standpipe
• Additional standpipe flow
• Minimum residual pressure
• Maximum pressure limitations
• Pressure-regulating devices
• Elevation pressure
• Friction loss
• Fire pump support
• Water supply duration

Candidates should identify the system class, building conditions, and number of standpipes before applying flow and pressure requirements.

Pressure-Regulating Devices

Pressure-regulating devices may be required where static or residual pressure exceeds permitted limits.

Study subjects may include:

• Pressure-reducing valves
• Pressure-restricting devices
• Outlet pressure settings
• Valve adjustment
• Required signage
• Testing at rated flow
• Accessibility
• Maintenance
• Replacement components
• System zoning

Improper adjustment can leave hose connections with either excessive pressure or insufficient firefighting performance.

NFPA 20 Stationary Fire Pumps

NFPA 20 addresses stationary pumps used when the available water supply cannot provide the required pressure or flow without mechanical assistance.

Important study areas may include:

• Centrifugal fire pumps
• Vertical turbine pumps
• Positive displacement pumps
• Electric motor drivers
• Diesel engine drivers
• Fire pump controllers
• Transfer switches
• Suction piping
• Discharge piping
• Pressure-maintenance pumps
• Pump rooms
• Power supplies
• Acceptance testing
• System documentation

Candidates should become familiar with the relationship between the pump, driver, controller, water supply, and connected fire protection systems.

Fire Pump Selection and Arrangement

Fire pumps are selected to meet the required system flow and pressure based on the available water supply and calculated fire protection demand.

Study areas may include:

• Rated flow
• Rated pressure
• Pump curves
• Churn pressure
• Rated capacity performance
• Maximum flow performance
• Suction pressure
• Discharge pressure
• System demand
• Pressure zones
• Series pump arrangements
• Parallel pump arrangements

Candidates should understand how pump performance is evaluated at no flow, rated flow, and higher-flow test points.

Fire Pump Suction Piping

Suction piping must provide a reliable, unobstructed water path to the fire pump.

Study subjects may include:

• Suction pipe sizing
• Pipe arrangement
• Eccentric reducers
• Valves
• Strainers where applicable
• Flow disturbances
• Elbows near the pump
• Positive suction pressure
• Water storage tanks
• Backflow prevention effects
• Pressure gauges
• Testing connections

Improper suction arrangements can reduce pump performance and create unstable operating conditions.

Fire Pump Discharge Piping

Discharge piping carries water from the fire pump to the fire protection system.

Study areas may include:

• Discharge check valves
• Indicating control valves
• Pressure gauges
• Test headers
• Flow meters
• Relief valves where applicable
• Circulation relief valves
• Pipe sizing
• System connections
• Drainage
• Pressure sensing lines

Candidates should understand the purpose and required sequence of major components in the pump discharge arrangement.

Fire Pump Drivers

A fire pump may be driven by an electric motor, diesel engine, or another approved driver.

Study subjects may include:

• Electric motor ratings
• Diesel engine ratings
• Power supply reliability
• Disconnecting means
• Fuel supplies
• Batteries
• Cooling systems
• Exhaust systems
• Ventilation
• Starting arrangements
• Overspeed protection
• Driver testing

Candidates should identify the driver type before applying electrical, fuel, ventilation, or testing requirements.

Fire Pump Controllers

The fire pump controller starts, monitors, and controls the fire pump driver.

Study areas may include:

• Automatic starting
• Manual starting
• Pressure-actuated starting
• Controller location
• Controller accessibility
• Electric motor controllers
• Diesel engine controllers
• Transfer switches
• Alarm and supervisory signals
• Pressure sensing lines
• Controller ratings
• Emergency operation

The controller should be located and installed so it remains accessible and protected while supporting reliable pump operation.

Pressure-Maintenance Pumps

A pressure-maintenance pump, commonly called a jockey pump, helps maintain system pressure and reduce unnecessary fire pump starts caused by minor leakage or pressure changes.

Study subjects may include:

• Jockey pump capacity
• Pressure settings
• Start and stop sequence
• Relationship to fire pump settings
• Controller arrangement
• Check valves
• Isolation valves
• Testing
• Maintenance

The pressure-maintenance pump should not be sized or adjusted in a way that prevents the fire pump from starting when a significant system demand occurs.

Fire Pump Rooms

Fire pump rooms must provide suitable access, protection, temperature control, lighting, drainage, and working space.

Study areas may include:

• Room location
• Fire-resistance separation
• Direct access
• Working clearances
• Heating
• Ventilation
• Drainage
• Emergency lighting
• Equipment protection
• Flood protection
• Controller access
• Fuel-system arrangement

Candidates should review both NFPA 20 and applicable building or fire-code requirements when a question concerns the pump room.

Fire Pump Acceptance Testing

Acceptance testing verifies that the installed fire pump system performs according to the approved design and applicable standard.

Testing may include:

• No-flow operation
• Rated-flow testing
• High-flow testing
• Suction pressure readings
• Discharge pressure readings
• Driver speed
• Voltage and current readings
• Diesel engine operation
• Automatic starting
• Manual starting
• Transfer switch operation
• Alarm and supervisory signals
• Controller operation
• Test documentation

Test results should be compared with the approved pump data and required performance characteristics.

System Flushing

Flushing removes debris from underground and aboveground piping before the system is placed into service.

Study areas may include:

• Underground piping flushing
• Required flushing flow
• Flushing outlets
• Safe discharge locations
• Coordination with water utilities
• Protection from flooding
• Removal of construction debris
• Flushing documentation
• Contractor certificates

Debris left in the piping can obstruct sprinklers, valves, check valves, fire pump components, and test connections.

Hydrostatic Testing

Hydrostatic testing verifies the integrity of installed piping, joints, fittings, and system components.

Preparation may include:

• Required test pressure
• Test duration
• Permitted pressure loss
• Visible leakage
• Test equipment
• Isolation of sensitive components
• Cold-weather precautions
• Repair and retesting
• Test witnessing
• Test documentation

Candidates should use the standard that applies to the specific sprinkler, standpipe, underground, or fire pump piping being tested.

Acceptance Testing and Documentation

Acceptance testing demonstrates that the completed system operates according to approved plans and applicable standards.

Testing and documentation may include:

• Hydrostatic tests
• Underground flushing
• Main drain tests
• Waterflow alarm tests
• Valve supervisory tests
• Dry-pipe valve trip tests
• Preaction and deluge system tests
• Standpipe flow tests
• Pressure-regulating device tests
• Fire pump acceptance tests
• Contractor material and test certificates
• Record drawings
• Owner training
• Operating instructions

Candidates should understand which tests apply to each system and what records must be completed before final acceptance.

NFPA 25 Inspection, Testing, and Maintenance

NFPA 25 addresses the ongoing inspection, testing, and maintenance of water-based fire protection systems after installation.

Important study areas may include:

• Sprinkler inspection
• Valve inspection
• Gauge testing
• Main drain testing
• Waterflow alarm testing
• Standpipe testing
• Fire pump testing
• Water storage tank inspection
• Private fire service main testing
• Internal pipe inspection
• Obstruction investigation
• Impairment procedures
• Recordkeeping
• Maintenance and repairs

Candidates should understand that NFPA 25 focuses on maintaining existing systems rather than establishing the original installation design.

Inspection, Testing, and Maintenance Differences

NFPA 25 distinguishes between inspection, testing, and maintenance activities.

• Inspection generally involves visual examination to determine whether a component appears to be in operating condition and free from damage.
• Testing involves operating or measuring a component to verify performance.
• Maintenance involves work performed to keep equipment operational or restore it to proper condition.

Candidates should identify which type of activity the question describes before locating the frequency or procedure.

System Impairments

An impairment exists when a fire protection system or part of a system is out of service or unable to perform as intended.

Preparation may include:

• Planned impairments
• Emergency impairments
• Identifying affected areas
• Notifying responsible parties
• Notifying the authority having jurisdiction
• Notifying alarm-monitoring services
• Fire watch procedures
• Temporary protection
• Impairment tags
• Expedited repairs
• Restoration testing
• Final notifications

Contractors should understand both the technical repair work and the communication procedures needed to manage an impairment safely.

Sprinkler Inspection and Replacement

Existing sprinklers should be inspected for conditions that may interfere with operation or discharge.

Possible conditions include:

• Corrosion
• Paint
• Loading or residue
• Physical damage
• Obstruction
• Improper orientation
• Missing escutcheons
• Leaks
• Incorrect temperature rating
• Changes in occupancy or storage
• Insufficient clearance below sprinklers

Replacement sprinklers should match the required characteristics and be installed using approved tools and procedures.

Control Valve Inspection

Control valves must remain open, accessible, properly identified, and supervised where required.

Inspection may include:

• Correct valve position
• Locks or seals
• Electronic supervision
• Accessibility
• Leakage
• Physical damage
• Identification signs
• Valve wrench availability
• Normal pressure conditions
• Obstructions to operation

A closed or improperly positioned valve can disable a major portion of a fire protection system.

Main Drain Testing

Main drain testing helps identify significant changes in the condition of the water supply.

The procedure generally involves:

• Recording static pressure
• Opening the main drain
• Allowing the pressure to stabilize
• Recording residual pressure
• Closing the drain slowly
• Comparing results with previous tests
• Investigating significant changes
• Documenting the results

A substantial change may indicate a partially closed valve, supply restriction, backflow assembly issue, or another water-supply problem.

Waterflow Alarm Testing

Waterflow alarm testing verifies that system operation produces the required local and transmitted alarm signals.

Study subjects may include:

• Inspector’s test connections
• Mechanical alarm devices
• Electric waterflow switches
• Alarm transmission
• Time to alarm
• Testing dry or preaction systems
• Reset procedures
• Drainage after testing
• Documentation

Candidates should understand how the test connection simulates the flow from an operating sprinkler.

Standpipe Inspection and Testing

Existing standpipe systems require inspection and testing to verify that valves, hose connections, pressure-regulating devices, piping, and water supplies remain serviceable.

Study areas may include:

• Hose connection inspection
• Cap and chain condition
• Valve operation
• Cabinet condition
• Pressure-regulating device testing
• Hydrostatic testing
• Flow testing
• Fire department connection inspection
• System drainage
• Signage
• Recordkeeping

Candidates should identify whether the question concerns an installation requirement under NFPA 14 or an ongoing maintenance requirement under NFPA 25.

Fire Pump Inspection and Testing

Existing fire pumps require recurring inspection and testing to confirm reliable operation.

Preparation may include:

• Pump-room condition
• Controller status
• Power supply condition
• Diesel fuel level
• Battery condition
• Oil and coolant levels
• Suction and discharge pressure
• Automatic start testing
• No-flow operation
• Annual flow testing
• Alarm signal verification
• Maintenance records

Candidates should distinguish the original acceptance test under NFPA 20 from recurring inspection and testing under NFPA 25.

System Records and Documentation

Fire suppression system documentation provides evidence of approved installation, testing, maintenance, and repairs.

Important records may include:

• Approved plans
• Hydraulic calculations
• Product data
• Material certifications
• Contractor material and test certificates
• Hydrostatic test records
• Flushing records
• Fire pump test reports
• Standpipe flow test reports
• Inspection reports
• Impairment records
• Maintenance records
• Record drawings
• Owner training documentation

Complete records support system acceptance, future inspections, repairs, alterations, and investigation of performance problems.

Approved Plans and Shop Drawings

Installation work should be compared with the approved plans, calculations, specifications, and product information.

Important plan information may include:

• System type
• Occupancy hazard classification
• Sprinkler types
• Pipe sizes
• Pipe routing
• Hydraulic design areas
• Water supply information
• Control valve locations
• Fire department connection location
• Standpipe risers
• Hose connection locations
• Fire pump data
• Seismic bracing
• Design criteria

Field changes should be documented and approved through the required process rather than made without authorization.

Coordination with Other Trades

Fire suppression piping must be coordinated with structural, mechanical, electrical, plumbing, architectural, and ceiling systems.

Coordination subjects may include:

• Structural beams and joists
• Mechanical ductwork
• Electrical conduits and cable trays
• Plumbing piping
• Ceiling grids
• Lighting fixtures
• Access panels
• Equipment clearances
• Storage arrangements
• Penetrations and sleeves
• Firestopping
• Seismic joints

Poor coordination can create sprinkler obstructions, inadequate access, incorrect elevations, damaged piping, and unapproved field changes.

Firestopping and Penetrations

Fire suppression piping may pass through fire-resistance-rated walls, floors, shafts, and assemblies.

Inspection and coordination considerations may include:

• Rated assembly identification
• Penetration size
• Annular space
• Approved firestop systems
• Pipe material
• Insulation
• Sleeves
• Movement requirements
• Installation instructions
• Inspection access
• Labeling and documentation

The fire suppression contractor should coordinate penetrations so the required fire-resistance rating is maintained.

Contractor Safety Responsibilities

Fire suppression installation involves overhead work, heavy pipe, pressurized systems, power tools, lifts, ladders, testing equipment, and active construction sites.

Important safety considerations may include:

• Personal protective equipment
• Fall protection
• Lift and ladder safety
• Rigging and material handling
• Hot-work permits
• Welding and cutting safety
• Pressure-testing hazards
• Stored-energy hazards
• Lockout and tagout
• Electrical hazards near fire pumps
• Confined spaces
• Excavation safety
• Housekeeping
• Communication during testing

Candidates should connect code compliance with the responsibility to protect workers, building occupants, inspectors, and property.

Reference-Book Navigation

An open-book examination still requires fast and accurate navigation. A candidate may lose valuable time by searching NFPA 13 for a fire pump question or NFPA 25 for an original installation requirement.

A practical lookup method includes:

• Read the complete question
• Identify the system or code subject
• Determine whether the question concerns installation or maintenance
• Select the most likely reference
• Use the table of contents or index
• Locate the complete section or table
• Review definitions, notes, exceptions, and annex references
• Confirm that the rule applies to the stated condition
• Record difficult topics for additional practice

Candidates should practice selecting the correct book before searching for the exact answer.

Organizing the G35-N Books

Tabs, highlighting, bookmarks, and permitted notes may improve navigation when they comply with current testing rules.

A practical tab system may include:

• IBC occupancy classifications
• IBC sprinkler requirements
• IBC standpipe requirements
• IFC fire protection systems
• IFC impairments
• NFPA 13 system types
• NFPA 13 hazard classifications
• NFPA 13 sprinkler spacing
• NFPA 13 obstructions
• NFPA 14 standpipe classes
• NFPA 14 pressure and flow
• NFPA 20 pump components
• NFPA 20 acceptance tests
• NFPA 25 inspection frequencies
• NFPA 25 impairment procedures

Candidates should verify current ICC rules before adding tabs, notes, highlighting, or other modifications.

Build a Reference Map

A reference map is a short study sheet that identifies the major purpose and high-value chapters of each book.

A useful reference map may include:

• The subject covered by each book
• Important definitions
• System-type chapters
• Major component chapters
• Testing chapters
• Frequently used tables
• Important figures
• Installation certificates
• Maintenance frequencies
• Impairment procedures

The purpose is not to replace the books. It is to help candidates select the correct book quickly when reading a question.

Basic Fire Protection Calculations

G35-N preparation may involve interpreting pressure, flow, pipe size, elevation, duration, test data, and system demand.

Useful calculation and interpretation skills may include:

• Converting units
• Reading pressure gauges
• Reading flow-test information
• Understanding static and residual pressure
• Evaluating elevation pressure
• Recognizing friction loss
• Reading fire pump curves
• Comparing pump test results
• Interpreting sprinkler discharge information
• Reading hydraulic calculation summaries
• Comparing required and available water supply
• Applying percentage relationships

Candidates should confirm the units used in every question before completing a calculation or selecting an answer.

How to Prepare for the ICC G35-N Exam

Begin preparing several weeks before the examination and divide the references into manageable subjects.

A practical study schedule may include:

• ICC Contractor and Trades exam rules
• IBC occupancy and sprinkler requirements
• IFC fire protection system requirements
• NFPA 13 sprinkler system types
• Hazard classifications
• Sprinkler selection and spacing
• Obstruction rules
• Piping, valves, and supports
• NFPA 14 standpipe classes and types
• Standpipe pressure and flow
• NFPA 20 fire pump components
• Fire pump controllers and drivers
• Acceptance testing
• NFPA 25 inspection and maintenance
• Impairment procedures
• Timed reference-navigation practice

Use the same book editions throughout preparation that you expect to use during the examination.

Practice with Fire Suppression Scenarios

Scenario-based study helps candidates connect technical requirements with realistic installation and service conditions.

Useful practice questions may include:

• Which standard applies to the system described?
• Is the sprinkler type suitable for the location?
• Does an obstruction require additional sprinklers?
• Is the pipe material permitted?
• Is the hanger spacing acceptable?
• Which standpipe class is required?
• What pressure-regulating equipment is needed?
• Does the available water supply support the system?
• Is the fire pump arrangement compliant?
• Which acceptance test must be performed?
• How should a system impairment be managed?
• What documentation must be completed?

After answering each question, candidates should locate the supporting section and review why the selected requirement applies.

Time-Management Strategies

Effective time management helps candidates avoid becoming stuck on one complex code lookup or technical scenario.

Helpful strategies include:

• Answer familiar questions first
• Mark difficult questions for later review
• Identify the correct reference before searching
• Avoid searching every book for one answer
• Use permitted tabs efficiently
• Read every system condition carefully
• Eliminate clearly incorrect choices
• Keep calculations organized
• Reserve time for unanswered questions
• Practice under realistic time limits

Timed practice can reveal whether a candidate needs to improve terminology, book selection, calculation accuracy, or navigation speed.

Reviewing Missed Questions

Reviewing mistakes is one of the most useful parts of exam preparation.

For each missed question, identify:

• The system or component being tested
• The correct reference book
• The keyword that should have been used
• The applicable section or table
• The definition that affected the answer
• The exception or special condition
• Whether the error involved reading or navigation
• What should be reviewed before the next study session

A mistake log can help candidates identify repeated weak areas and direct their study time more effectively.

Why Book-Based Preparation Helps

Printed codes and standards allow candidates to study the same terminology, system requirements, tables, figures, testing procedures, and documentation provisions used in fire suppression work.

Book-based preparation may help candidates:

• Learn the organization of every reference
• Recognize which standard applies to each question
• Create a personalized navigation system
• Highlight important requirements
• Add permitted notes and reminders
• Compare installation and maintenance provisions
• Practice without electronic search tools
• Retain the books for professional use

The package is most effective when candidates actively locate and apply requirements rather than relying only on memorization.

Who Should Consider the G35-N Exam Book Package?

The ICC Class DF Fire Suppression Installation Contractor - G35-N Exam Book Package may be useful for:

• Fire suppression contractor candidates
• Fire sprinkler contractors
• Sprinkler fitters
• Fire protection supervisors
• Fire protection project managers
• Standpipe installers
• Fire pump installers
• Inspection and testing personnel
• Fire protection service technicians
• Building and fire department personnel
• Quality-control personnel
• Professionals preparing for an ICC Contractor and Trades exam

Candidates should confirm that G35-N and the listed editions are accepted by the jurisdiction where they plan to become licensed.

FAQ

Q. What is the ICC Class DF Fire Suppression Installation Contractor - G35-N exam?

A. It is an ICC Contractor and Trades examination path used by participating licensing authorities to evaluate knowledge of water-based fire suppression installation, sprinkler systems, standpipes, fire pumps, building codes, fire codes, testing, and contractor responsibilities.

Q. How much does the G35-N Exam Book Package cost?

A. The package is listed at a sale price of $1,495.00, reduced from the regular price of $1,595.00.

Q. What books are included in the package?

A. The current listing identifies the 2018 International Building Code, 2018 International Fire Code, 2016 NFPA 13, 2016 NFPA 14, 2016 NFPA 20, and 2017 NFPA 25.

Q. Does the package include an online course?

A. No. This product is listed as an exam book package containing the specified printed codes and standards.

Q. What does NFPA 13 cover?

A. NFPA 13 covers the design and installation of automatic sprinkler systems, including system types, sprinkler selection, spacing, obstructions, piping, hangers, valves, water supplies, and acceptance testing.

Q. What does NFPA 14 cover?

A. NFPA 14 covers standpipe and hose systems, including system classes, system types, hose connections, water supplies, pressure, flow, fire department connections, and acceptance testing.

Q. What does NFPA 20 cover?

A. NFPA 20 covers stationary fire pumps, including pumps, drivers, controllers, suction piping, discharge piping, pump rooms, power supplies, and acceptance testing.

Q. What does NFPA 25 cover?

A. NFPA 25 covers inspection, testing, maintenance, and impairment procedures for existing water-based fire protection systems.

Q. Why are the IBC and IFC included?

A. The IBC helps candidates study when fire protection systems are required in buildings. The IFC supports preparation involving permits, acceptance, operations, system impairments, maintenance, and ongoing fire-safety responsibilities.

Q. What sprinkler systems should I study?

A. Candidates should review wet-pipe, dry-pipe, preaction, deluge, and other system types included in the approved examination outline and references.

Q. Should I study sprinkler spacing and obstructions?

A. Yes. Sprinkler position, spacing, ceiling configuration, structural members, ducts, lights, storage, and other obstructions are important installation subjects.

Q. Should I study standpipe classes?

A. Yes. Candidates should understand Class I, Class II, and Class III systems and distinguish the system class from whether the standpipe is automatic, manual, wet, or dry.

Q. Should I study fire pump curves?

A. Yes. Candidates should understand rated flow, rated pressure, churn conditions, higher-flow performance, suction pressure, discharge pressure, and acceptance-test results.

Q. What is the difference between NFPA 13 and NFPA 25?

A. NFPA 13 primarily addresses sprinkler system installation, while NFPA 25 primarily addresses inspection, testing, and maintenance after a system is in service.

Q. What is a fire protection system impairment?

A. An impairment is a condition in which a system or part of a system is out of service or unable to perform as intended. Impairment procedures may include notifications, temporary precautions, repairs, restoration testing, and final documentation.

Q. Is the G35-N exam open book?

A. Current product information describes the examination path as open book. Candidates should verify the latest ICC and jurisdictional rules before registering.

Q. Does open book mean the exam is easy?

A. No. Candidates must select the correct reference, find the applicable requirement, interpret the technical language, and answer within the permitted testing time.

Q. Can I highlight and tab the books?

A. Book-marking rules may change. Candidates should confirm current requirements for tabs, highlighting, handwritten notes, and loose materials before exam day.

Q. How should I organize the six books?

A. Organize them by subject and learn which book covers building requirements, fire-code duties, sprinklers, standpipes, fire pumps, and ongoing inspection or maintenance.

Q. Should I practice technical calculations?

A. Yes. Candidates should be comfortable interpreting pressure, flow, elevation, pump performance, water-supply test data, and other system information identified in the current examination outline.

Q. Does passing G35-N automatically issue a contractor license?

A. No. Passing the exam may satisfy a testing requirement, but the applicable licensing authority controls experience, applications, insurance, financial requirements, and final license approval.

Q. Can field experience replace exam preparation?

A. Field experience is valuable, but candidates should also practice book navigation, technical interpretation, system scenarios, and exam-style questions.

Q. Can the approved code editions change?

A. Yes. Candidates should verify the latest approved references through ICC and the applicable licensing authority before purchasing books or registering.

Q. Does the package guarantee that I will pass?

A. No. The package supports organized study and reference familiarity, but exam results depend on the candidate’s experience, preparation, study consistency, and test-day performance.

Q. Where can I purchase the G35-N Exam Book Package?

A. The package is available through the ICC Class DF Fire Suppression Installation Contractor - G35-N collection.

Conclusion

The ICC Class DF Fire Suppression Installation Contractor - G35-N examination requires candidates to connect practical fire protection experience with building-code requirements, fire-code responsibilities, sprinkler installation standards, standpipe requirements, fire pump systems, acceptance testing, and ongoing system maintenance.

The ICC Class DF Fire Suppression Installation Contractor - G35-N Exam Book Package brings together the 2018 International Building Code, 2018 International Fire Code, NFPA 13, NFPA 14, NFPA 20, and NFPA 25 for focused, book-based preparation.

The package is listed at a sale price of $1,495.00, reduced from the regular price of $1,595.00.

Successful candidates should verify current examination requirements, study the purpose and organization of every book, practice selecting the correct reference, review realistic installation scenarios, and complete timed lookup exercises before exam day.

Shop the ICC Class DF Fire Suppression Installation Contractor - G35-N Exam Book Package

Key Takeaways

• The package is designed for ICC Class DF Fire Suppression Installation Contractor - G35-N exam preparation.
• The sale price is $1,495.00.
• The regular price is $1,595.00.
• The package contains six fire protection codes and standards.
• The included references cover building, fire-code, sprinkler, standpipe, fire pump, inspection, testing, and maintenance subjects.
• NFPA 13 addresses sprinkler system installation.
• NFPA 14 addresses standpipe and hose systems.
• NFPA 20 addresses stationary fire pumps.
• NFPA 25 addresses inspection, testing, maintenance, and impairments.
• The IBC helps determine when fire protection systems are required.
• The IFC addresses permits, acceptance, operations, impairments, and ongoing responsibilities.
• Important study areas include sprinkler spacing, obstructions, piping, valves, water supplies, standpipes, fire pumps, and acceptance testing.
• Candidates should practice selecting the correct book before searching for an answer.
• Open-book testing still requires fast and accurate reference navigation.
• Passing an ICC exam does not automatically issue a contractor license.
• Candidates should verify current code editions, approved books, testing rules, and jurisdictional licensing requirements.
• Consistent study, realistic scenarios, and timed book navigation can improve exam readiness.