JOURNEYMAN PLUMBING END OF COURSE EXAM
2025/2026 QUESTIONS AND ANSWERS GRADED A++
✔✔Water closets, urinals, & Bidets set side by side shall be no closer than - ✔✔30"
center to center
✔✔minimum distance from a side wall to the center of a urinal - ✔✔12"
✔✔Tailpiece - ✔✔pipe or tubing that connects the outlet of a plumbing fixture to a trap
✔✔minimum tailpiece for lavatory - ✔✔1 1/4"
✔✔Water closet/bidet clear space in front - ✔✔24"
✔✔maximum bidet temp - ✔✔110
✔✔First Hour Rating - ✔✔water heater size chart
✔✔Water heaters installed in residential garages shall be installed so that all burners
and burner-ignition devices are located not less than 18 inches above the floor unless -
✔✔it is listed as flammable vapor ignition resistant
✔✔a passageway for a water heater in an attic must be - ✔✔24" wide
✔✔water heater attic access must be - ✔✔floored
✔✔in a gang shower, the maximum water temp discharging from any single head is
A) 105
B)115
C)109
D)120 - ✔✔120
✔✔A clothes washer trap must not be installed: - ✔✔below the floor, with a trap less
than 6" or more than 18" from the floor
✔✔A bar sink may be installed without a vent but must - ✔✔drain through an airgap
✔✔A standpipe for a clotheswasher must be - ✔✔between 18" and 30"
✔✔When can CPVC not be used for water - ✔✔in freezing temp climates, outside of
building, below ground
✔✔a 3 compartment bar sink connected with one trap must be a max distance: - ✔✔30"
center to center
, ✔✔water supplying a urinal must be protected by - ✔✔vaccum breaker/ backflow
preventer
✔✔Traps must be self - ✔✔scouring/ cleaning
✔✔backflow vs back water protection - ✔✔backflow is for water, backwater is for drains
✔✔minimum water service pipe size - ✔✔3/4
✔✔A shower drain outlet shall not be smaller than - ✔✔2"
✔✔minimum trap seal - ✔✔2"
✔✔discharge from water heater relief valve into its own pan is - ✔✔Prohibited
✔✔foot vent slope - ✔✔1/4" upward
✔✔minimum size loop vent for kitchen sink - ✔✔1 1/4
✔✔minimum size loop vent for kitchen sink - ✔✔1 1/4
✔✔2" vent serves - ✔✔24 fixture units
✔✔Lavatory fixture unit - ✔✔1 DFU
✔✔Bathtub fixture unit - ✔✔2 DFU
✔✔Water Closet fixture unit - ✔✔4 DFU
✔✔Water heater pans shall be drained by an indirect waste pipe of no less than ___
diameter or the diameter of the outlet of the required relief valve for the water heater. -
✔✔3/4"
✔✔vacumm breaker generally installed - ✔✔6" above fixture
✔✔Water chlorine mix must stay in the system for - ✔✔24 hours
✔✔max distance for a bar sink discharge before it needs a vent: - ✔✔5 feet max
✔✔ICCA117.1 - ✔✔Standard for accessible and usable fixtures
✔✔gallons of water in a cubic foot - ✔✔7.481
2025/2026 QUESTIONS AND ANSWERS GRADED A++
✔✔Water closets, urinals, & Bidets set side by side shall be no closer than - ✔✔30"
center to center
✔✔minimum distance from a side wall to the center of a urinal - ✔✔12"
✔✔Tailpiece - ✔✔pipe or tubing that connects the outlet of a plumbing fixture to a trap
✔✔minimum tailpiece for lavatory - ✔✔1 1/4"
✔✔Water closet/bidet clear space in front - ✔✔24"
✔✔maximum bidet temp - ✔✔110
✔✔First Hour Rating - ✔✔water heater size chart
✔✔Water heaters installed in residential garages shall be installed so that all burners
and burner-ignition devices are located not less than 18 inches above the floor unless -
✔✔it is listed as flammable vapor ignition resistant
✔✔a passageway for a water heater in an attic must be - ✔✔24" wide
✔✔water heater attic access must be - ✔✔floored
✔✔in a gang shower, the maximum water temp discharging from any single head is
A) 105
B)115
C)109
D)120 - ✔✔120
✔✔A clothes washer trap must not be installed: - ✔✔below the floor, with a trap less
than 6" or more than 18" from the floor
✔✔A bar sink may be installed without a vent but must - ✔✔drain through an airgap
✔✔A standpipe for a clotheswasher must be - ✔✔between 18" and 30"
✔✔When can CPVC not be used for water - ✔✔in freezing temp climates, outside of
building, below ground
✔✔a 3 compartment bar sink connected with one trap must be a max distance: - ✔✔30"
center to center
, ✔✔water supplying a urinal must be protected by - ✔✔vaccum breaker/ backflow
preventer
✔✔Traps must be self - ✔✔scouring/ cleaning
✔✔backflow vs back water protection - ✔✔backflow is for water, backwater is for drains
✔✔minimum water service pipe size - ✔✔3/4
✔✔A shower drain outlet shall not be smaller than - ✔✔2"
✔✔minimum trap seal - ✔✔2"
✔✔discharge from water heater relief valve into its own pan is - ✔✔Prohibited
✔✔foot vent slope - ✔✔1/4" upward
✔✔minimum size loop vent for kitchen sink - ✔✔1 1/4
✔✔minimum size loop vent for kitchen sink - ✔✔1 1/4
✔✔2" vent serves - ✔✔24 fixture units
✔✔Lavatory fixture unit - ✔✔1 DFU
✔✔Bathtub fixture unit - ✔✔2 DFU
✔✔Water Closet fixture unit - ✔✔4 DFU
✔✔Water heater pans shall be drained by an indirect waste pipe of no less than ___
diameter or the diameter of the outlet of the required relief valve for the water heater. -
✔✔3/4"
✔✔vacumm breaker generally installed - ✔✔6" above fixture
✔✔Water chlorine mix must stay in the system for - ✔✔24 hours
✔✔max distance for a bar sink discharge before it needs a vent: - ✔✔5 feet max
✔✔ICCA117.1 - ✔✔Standard for accessible and usable fixtures
✔✔gallons of water in a cubic foot - ✔✔7.481
