Free Journeyman Plumber Practice Test by State: 2026 Guide
Video
Which agency oversees plumber licensing in Washington State?
Code Administration
Question · Easy
Find 45 plumber practice routes across 44 states and DC, confirm your actual credential and references, and work through source-bounded code and trade-math examples.
Blog
Branch interval
Administration and General Regulations
Flashcard
Washington State's plumbing code is based on which model code?
Principal artery of a piping system, to which its branches connect.
Plumbing terms
Guess the Term
Chapter 1: Administration, Licensing, & General Regulations
1.1 Washington Plumber Certification Law: RCW 18.106, WAC 296-400A, Trainees, & Supervision
Study guide
What is the passing score required on the Washington journeyman plumber exam?
Read the clue and guess the term in 6 tries.
Game
Where does the building drain end and the building sewer begin?
Per the UPC, what is the minimum slope for a 4-inch horizontal drainage pipe?
Drainage Systems
Pair of bends that shifts a pipe sideways and leaves the new section parallel to the old one.
Per the UPC, what is the DFU (Drainage Fixture Unit) value for a water closet (flush tank type)?
Vent stack vs. stack vent
Per the UPC, what is the minimum building sewer size?
Question · Medium
Any piping other than a riser, main or stack.
1.2 Permits, Inspections, Tests, & Disinfection (UPC Chapter 1, 609, 712)
Per the UPC, what is the maximum distance between cleanouts in a horizontal drainage line?
Swap tiles to line up three of the same term.
Term Match
Flood level rim vs. critical level
Per the UPC, what is the minimum trap seal depth?
Supply pipe that climbs a full story or more to feed branches or a group of fixtures.
Per the UPC, what is the maximum number of fixture units allowed on a 2-inch horizontal branch?
What do you read off an isometric (riser) drawing on this exam?
Per the UPC, what type of fitting is required for a horizontal change of direction in a drainage system?
Any pipe that carries wastewater or waterborne wastes inside a building's waste-removal piping.
Sanitary piping
1.3 General Regulations: Prohibited Fittings, Pipe Protection, Nail Plates, Sleeves, & Trenching (UPC Chapter 3)
Per the UPC, what is the maximum water pressure at any fixture outlet?
Water Supply
Flip two cards at a time to find matching terms.
Term Pairs
Developed length
Per the UPC, what is the minimum water supply pressure required at a fixture outlet?
Kind of pipe that moves sewage with fecal matter to the building drain or building sewer.
Per the UPC, what type of backflow preventer is required for a high-hazard cross-connection?
Architect's scale: what does 1/4 inch = 1 foot-0 inches mean when you measure a plan?
Per the UPC, what is the minimum size water service pipe for a single-family residence?
Discharge from a fixture, appliance, area or appurtenance that has no fecal matter.
1.4 Hangers, Supports, Rod Sizes, Dissimilar Metals, & Expansion (UPC 313, Table 313.3)
Per the UPC, what is the maximum temperature for hot water delivered to a shower or bathtub?
Find five hidden terms in a grid of letters.
Term Search
IPC 312.2 - drainage and vent WATER test
Per the UPC, what is the T&P relief valve temperature setting on water heaters?
Vertical main of soil, waste or vent piping that passes through one or more stories.
Per the UPC, what is the Water Supply Fixture Unit (WSFU) value for a bathtub with shower?
IPC 312.3 - drainage and vent AIR test
Per the UPC, what type of valve is required at each fixture supply?
Fitting or device that keeps a liquid seal to block sewer gas without stopping wastewater flow.
Chapter 2: Plumbing Fixtures, Fittings, & Clearances
2.1 Fixture Setting, Clearances, Closet Flanges, & Water Closets (UPC 402, 411, 413; WA 402.5)
Per the UPC, what thermal expansion device is required when a water heater is installed on a closed system?
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