Washington Domestic Pump or Irrigation Specialty Plumber Book Package

Prepare for the Washington Domestic Pump or Irrigation Specialty Plumber examination with a focused reference package centered on the Washington State Amendments to the 2015 Uniform Plumbing Code. Washington's pump specialty plumbing examination is based on the 2015 Uniform Plumbing Code and the amendments adopted by the Washington State Building Code Council, with exam questions drawn from the plumbing-code provisions that apply to domestic pump and pump-and-irrigation work.

Washington recognizes two related specialty plumber certifications in this area: Pump & Irrigation (PL03) and Domestic Well (PL03A). The PSI examination is identified as the Domestic Pump or Irrigation Specialty Plumber examination. Candidates pursuing either pathway should understand the differences between the certifications, including the type of equipment and systems each specialty may work on and the experience requirements established by Washington.

The PL03 Pump & Irrigation specialty is limited to installation, maintenance, and repair of equipment used to acquire, treat, store, or move water suitable for drinking or irrigation purposes. The PL03A Domestic Well specialty covers qualifying domestic water pumping systems and has additional limits involving pump capacity and electrical characteristics.

The examination is open book and consists of 45 questions with 90 minutes allowed. Candidates must earn a minimum score of 70%. The examination draws questions from Chapters 2, 3, 6, and 16 of the 2015 Uniform Plumbing Code and the applicable Washington State Amendments.

Because this is an open-book examination, successful preparation involves more than reading plumbing-code provisions. Candidates should become familiar with the organization of the code, key definitions, water-supply and distribution requirements, materials, installation standards, cross-connection considerations, and Washington amendments that modify or supplement the base UPC requirements.

This package includes the Washington State Amendments to Uniform Plumbing Code, 2015, providing an important Washington-specific study reference for candidates preparing for the Domestic Pump or Irrigation Specialty Plumber examination.

What You Get

• Washington State Amendments to Uniform Plumbing Code, 2015
  Washington-specific amendments that modify and supplement the 2015 Uniform Plumbing Code. These provisions are important for understanding how Washington applies plumbing requirements to domestic pump, pump-and-irrigation, water-supply, and related plumbing work.

Exam Details

The Washington Domestic Pump or Irrigation Specialty Plumber examination is administered through PSI for the Washington State Department of Labor & Industries.

• Exam Name: Domestic Pump or Irrigation Specialty Plumber
• Number of Questions: 45
• Time Allowed: 90 minutes
• Passing Score: 70%
• Exam Type: Open book
• Testing Provider: PSI
• Code Basis: 2015 Uniform Plumbing Code with Washington State Amendments
• Exam Chapters: UPC Chapters 2, 3, 6, and 16 with applicable Washington amendments

Chapter 2 contains definitions that establish the meaning of plumbing terms used throughout the code. Understanding those definitions is important because exam questions may depend on the precise code meaning of terms associated with water supply, piping, fixtures, devices, systems, and equipment.

Chapter 3 addresses general regulations. Candidates should understand requirements affecting installation practices, materials, protection of piping, structural considerations, workmanship, access, and other general plumbing requirements that may apply to pump and irrigation work.

Chapter 6 addresses water supply and distribution. This is particularly relevant to domestic pump and irrigation specialty work because the classification involves equipment used to acquire, treat, store, pressurize, or move water. Candidates should become comfortable locating requirements involving water piping, sizing, pressure, materials, valves, connections, and related water-distribution provisions.

Chapter 16 contains additional plumbing provisions relevant to the examination. Candidates should study this chapter together with the Washington amendments rather than relying on the base UPC language alone.

Open Book Test

The Washington Domestic Pump or Irrigation Specialty Plumber examination is an open book test.

The approved pump-specialty examination reference is the 2015 Uniform Plumbing Code with the Washington State Amendments. Candidates are responsible for bringing approved reference materials to the examination center.

Reference materials may be highlighted, underlined, annotated, and indexed before the examination session. Candidates may not write in the references during the examination itself. Permanent tabs may be used to organize approved references, while temporary tabs such as removable Post-it-style notes are not permitted.

Additional loose papers or materials attached to approved references are not permitted in the examination room. Candidates should prepare their books before test day and make sure the references comply with PSI testing-center requirements.

For an open-book exam, fast navigation is valuable. Candidates should become familiar with the chapter organization and should know where to find definitions, general regulations, water-supply provisions, and Washington-specific amendments without relying entirely on the index.

Practice locating provisions under time pressure. With 45 questions and 90 minutes, the average testing time is approximately two minutes per question. Familiarity with the code can help preserve time for questions that require closer reading or comparison between the base UPC language and a Washington amendment.

Licensing Steps

Washington specialty plumber certification is administered by the Washington State Department of Labor & Industries. Candidates must establish examination eligibility with L&I before scheduling the examination through PSI.

1. Choose the appropriate specialty pathway. Determine whether you are pursuing Pump & Irrigation (PL03) or Domestic Well (PL03A) certification.
2. Accumulate the required qualifying experience. Work experience must fall within the applicable specialty and be performed under the required supervision.
3. Make sure your experience documentation is on file. Washington plumber trainees must document qualifying experience through the required affidavits.
4. Apply for examination eligibility through Washington Labor & Industries. L&I reviews the application and supporting experience documentation.
5. Receive examination approval. Approved applications are valid for one year.
6. Schedule the examination through PSI. After L&I approves eligibility, candidates receive instructions for scheduling the exam.
7. Prepare using the applicable plumbing code and Washington amendments. Focus on UPC Chapters 2, 3, 6, and 16 and the corresponding Washington amendments.
8. Take the Domestic Pump or Irrigation Specialty Plumber examination. The examination contains 45 questions and allows 90 minutes.
9. Earn a passing score of at least 70%. Candidates who do not pass must follow Washington's reapplication and retesting requirements.
10. Complete the certification process. After successfully completing the examination, follow Labor & Industries requirements for issuance of the applicable specialty plumber certification.

State Requirements

Washington maintains separate certifications for PL03 Pump & Irrigation and PL03A Domestic Well, even though candidates take the Domestic Pump or Irrigation Specialty Plumber examination.

The PL03 Pump & Irrigation specialty is limited to installation, maintenance, and repair of equipment used to acquire, treat, store, or move water suitable for drinking or irrigation purposes.

The PL03 pathway requires at least 4,000 hours, or two years, of qualifying specialty work experience under the supervision of an appropriately certified plumber. Washington also notes that work in this trade requires the appropriate electrical certification.

The PL03A Domestic Well specialty is limited to installation, maintenance, and repair of equipment used to acquire, treat, store, or move drinking or irrigation water using a pump that does not exceed 100 gallons per minute or 7.5 horsepower, single phase.

The PL03A pathway requires at least 2,000 hours, or one year, of qualifying specialty work experience under the supervision of an appropriately certified plumber. Electrical certification requirements also apply to electrical work associated with this trade.

Because plumbing and electrical work can overlap in pump installations, Washington maintains combination plumber/electrician certification pathways for qualifying pump specialties. A plumber certificate by itself does not automatically authorize electrical work that requires electrical certification.

Candidates should pay close attention to the scope of the plumbing certificate they are pursuing. PL03 and PL03A are related but are not interchangeable. The limits of each certification determine the types of pumps, water systems, equipment, and installations that may be worked on under that credential.

Washington plumber certifications for domestic pump and pump-and-irrigation specialties renew on the plumber's birthdate on a three-year cycle. Continuing education requirements apply as part of Washington's plumber certification system.

Reference Books

• Washington State Amendments to Uniform Plumbing Code, 2015
  Washington-specific plumbing amendments that modify and supplement the 2015 Uniform Plumbing Code. Candidates preparing for the Domestic Pump or Irrigation Specialty Plumber examination should study the amendments that correspond to UPC Chapters 2, 3, 6, and 16.

Exam Room Approved Books

• 2015 Uniform Plumbing Code with Washington State Amendments
  The approved reference for the Washington pump specialty examination. Candidates are responsible for bringing the reference to the testing center. Approved materials may be highlighted, underlined, annotated, and indexed before the examination and may use permanent tabs that comply with PSI rules.

Test Information and Study Materials

UPC Chapter 2 — Definitions: Learn the plumbing-code terminology that applies to water systems, piping, devices, equipment, fixtures, connections, potable water, and other concepts relevant to pump and irrigation installations. Definitions can affect how requirements are interpreted throughout the code.

UPC Chapter 3 — General Regulations: Review general requirements concerning materials, installation, protection, workmanship, access, structural considerations, and other basic plumbing practices. These provisions establish rules that may apply even when a question is focused on a more specific water-system subject.

UPC Chapter 6 — Water Supply and Distribution: Give this chapter substantial attention. Domestic pumps and irrigation systems depend on proper water-supply and distribution practices, including piping, materials, pressure, sizing, valves, protection, and connections.

UPC Chapter 16: Review the provisions in this chapter that fall within the published examination scope and compare them with the applicable Washington amendments.

Washington Amendments: Do not study the base UPC in isolation. Washington amendments may modify requirements, add state-specific provisions, or change how a section is applied. When studying an exam topic, check whether Washington has amended the corresponding UPC language.

Pump & Irrigation Scope: Candidates pursuing PL03 should understand that the specialty concerns equipment used to acquire, treat, store, and move water suitable for drinking or irrigation. Study the practical relationship between pumps, tanks, water treatment equipment, piping, valves, and other plumbing components.

Domestic Well Scope: Candidates pursuing PL03A should pay particular attention to the specialty's limits, including the maximum 100-gallon-per-minute or 7.5-horsepower, single-phase pump criteria established by Washington.

Water-System Components: Review the function and installation considerations of pumps, pressure tanks, storage tanks, valves, piping, filtration equipment, water-treatment components, and other equipment found in domestic pump and irrigation systems.

Code Navigation: Because the examination is open book, practice finding provisions rather than simply reading them. Use permanent tabs for major chapters and frequently referenced topics when permitted under PSI rules.

Timed Practice: The examination allows 90 minutes for 45 questions. Practice code lookups with a similar pace so you can recognize when to answer from knowledge, when to confirm a provision, and when to move forward and return to a difficult question.

Washington-Specific Study: Review the Washington amendments closely. State amendments can be especially important on an exam because they may change a requirement that a candidate remembers from the standard UPC.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps Washington Domestic Pump and Pump & Irrigation Specialty Plumber candidates build an organized study approach around the plumbing-code provisions and Washington amendments that apply to the examination.

Preparation can focus on the specific published exam chapters rather than treating the entire plumbing code as equally important. Concentrating on UPC Chapters 2, 3, 6, and 16 helps candidates direct study time toward the subjects included in the Domestic Pump or Irrigation Specialty Plumber examination.

1 Exam Prep encourages practice-oriented preparation for the open-book testing environment. Candidates can improve code-navigation skills by reading a question, identifying the likely chapter or subject, locating the controlling provision, checking the corresponding Washington amendment, and applying the rule to the question.

Trade-focused study can also help connect code requirements with real-world pump and irrigation work. Understanding how pumps, tanks, valves, water-treatment components, water piping, pressure, and distribution systems work together gives candidates a stronger framework for interpreting code questions.

Washington-specific preparation is especially important because the examination uses the 2015 Uniform Plumbing Code together with Washington State Amendments. Becoming familiar with those amendments helps candidates recognize when the state requirement differs from or supplements the base plumbing code.

The goal is to combine practical pump-system knowledge with organized code review, reference navigation, Washington-specific study, and confidence-building preparation. This Washington Domestic Pump or Irrigation Specialty Plumber Book Package provides a state-focused reference to support that process.

Frequently Asked Questions

What examination does this package support?

This package is designed for candidates preparing for the Washington Domestic Pump or Irrigation Specialty Plumber examination.

What book is included in this package?

This package includes the Washington State Amendments to Uniform Plumbing Code, 2015.

Is the Washington Domestic Pump or Irrigation Specialty Plumber exam open book?

Yes. The Domestic Pump or Irrigation Specialty Plumber examination is an open book examination.

How many questions are on the exam?

The examination contains 45 questions.

How much time is allowed?

Candidates have 90 minutes to complete the examination.

What score is required to pass?

A minimum score of 70% is required.

What UPC chapters are tested?

The examination contains questions from Chapters 2, 3, 6, and 16 of the 2015 Uniform Plumbing Code and the applicable Washington State Amendments.

What reference is allowed in the examination room?

The approved pump-specialty reference is the 2015 Uniform Plumbing Code with Washington State Amendments. Candidates are responsible for bringing approved reference materials to the testing center.

Can the exam book be tabbed?

Yes. Approved references may use permanent indexing tabs. Temporary tabs such as Post-it-style notes are not permitted.

Can the exam reference contain highlighting or notes?

Approved references may be highlighted, underlined, annotated, and indexed before the examination. Candidates may not write in their reference materials during the examination session.

What is the PL03 Pump & Irrigation certification?

PL03 is limited to installation, maintenance, and repair of equipment used to acquire, treat, store, or move water suitable for drinking or irrigation purposes.

How much experience is required for PL03?

The Pump & Irrigation specialty requires at least 4,000 hours, or two years, of qualifying specialty experience under appropriate supervision.

What is the PL03A Domestic Well certification?

PL03A covers qualifying equipment used to acquire, treat, store, or move drinking or irrigation water using a pump not exceeding 100 gallons per minute or 7.5 horsepower, single phase.

How much experience is required for PL03A?

The Domestic Well specialty requires at least 2,000 hours, or one year, of qualifying specialty experience under appropriate supervision.

Do pump specialty plumbers also need electrical certification?

Washington requires appropriate electrical certification for electrical work associated with the pump and irrigation and domestic well trades.

Do I need L&I approval before scheduling the exam?

Yes. Candidates must first establish examination eligibility with Washington Labor & Industries. After approval, the candidate can schedule the examination through PSI.

Who administers the examination?

The Washington Domestic Pump or Irrigation Specialty Plumber examination is administered through PSI for the Washington State Department of Labor & Industries.

What should I focus on while studying?

Focus on UPC Chapters 2, 3, 6, and 16, the Washington State Amendments, water-supply and distribution requirements, pump-system components, specialty scope, and efficient open-book code navigation.