Plumbing Code Exam 2026 1 of 66
A 2" copper-tubing cold water line shall be supported 10 feet
horizontally at intervals of __________.
104.2 A plumbing permit.
What does replacing plumbing fixtures require?
105.2.3 Inspection Requests 24 hours
The Authority Having Jurisdiction shall be permitted to require a
____________ notice before inspection.
310.1 Fittings Prohibited fitting
A side inlet quarter bend is an example of a __________.
310.7 Direction of Flow correct relationship
Valves, pipes, and fittings shall be installed in _________ to the
direction of flow.
2/5/2026 1
,Plumbing Code Exam 2026 2 of 66
312.9 Steel Nail Plates No. 18
Plastic and copper or copper alloy piping penetrating framing
members to within 1" of the exposed framing shall be protected
by steel nail plates not less than ____________ in thickness.
312.9 Steel Nail Plates 1 1/2"
Steel nail plates shall extend along the framing not less than
_____ beyond the diameter of the pipe and tubing.
312.10 Sleeves Concrete & masonry walls
Sleeves shall be provided to protect piping through what kind of
walls?
313.3 Suspended Piping At every joint
No-hub cast iron piping in 5' lengths, installed horizontally
above ground, shall be supported _________.
402.5 Setting 12
No urinal shall be set closer than _____ inches from its center to 24
a side wall or partition or closer than _____ inches from center
to center.
2/5/2026 2
,Plumbing Code Exam 2026 3 of 66
402.5 Setting 15
No water closet or bidet shall be set closer than _____ inches 30
from its center to a side wall or obstruction or closer than _____
inches center to center to a similar fixture.
402.5 Setting 24
The clear space in front of a water closet, lavatory, or bidet shall
be not less than _____ inches.
402.6.1 Closet Rings (closet flanges) Top of the closet ring
Closet bends or stubs shall be cut off so as to present a smooth
surface, even with the ____________.
402.6 Flanged Fixture Connections carrier fitting
Wall-mounted water closet fixtures shall be securely bolted to an
approved ______ ______. The connecting pipe between ______
______ and the fixture shall be an approved material and
designed to accommodate an adequately sized gasket. Gasket
material shall be neoprene, felt, or similar approved gaskets.
402.10 Slip Joint Connections 12" x 12" access panel
A bathtub with slip joint connections that will be concealed shall
be provided with a minimum ____________.
2/5/2026 3
, Plumbing Code Exam 2026 4 of 66
404.2 Overflows House or inlet side of the trap
The overflow pipe from a fixture shall be connected on the
_______________.
407.2 Water Consumption 2.2 gpm
The maximum water use allowed in gallons per minute (gpm) or 8.3 lpm
liters per minute (lpm) for lavatory faucets, kitchen faucets, and
replacement aerators is _____ gpm/ _____ lpm
WSA: Washington State Amendments
407.2 Water Consumption 0.5 gpm
The maximum water use allowed in gallons per minute (gpm) or 1.9 lpm
liters per minute (lpm) for public lavatory faucets other than
metering is _____ gpm/ _____ lpm
WSA: Washington State Amendments
407.4 Metering Valves spring
Lavatory faucets located in restrooms intended for use by the water pressure
general public shall be equipped with a metering valve designed
to close by __________ or __________ when left unattended Exception: 1. Where designed and installed for use by persons with disability 2. Where
(self-closing). installed in day care centers, for use primarily by children under 6 years of age
WSA: Washington State Amendments
2/5/2026 4
A 2" copper-tubing cold water line shall be supported 10 feet
horizontally at intervals of __________.
104.2 A plumbing permit.
What does replacing plumbing fixtures require?
105.2.3 Inspection Requests 24 hours
The Authority Having Jurisdiction shall be permitted to require a
____________ notice before inspection.
310.1 Fittings Prohibited fitting
A side inlet quarter bend is an example of a __________.
310.7 Direction of Flow correct relationship
Valves, pipes, and fittings shall be installed in _________ to the
direction of flow.
2/5/2026 1
,Plumbing Code Exam 2026 2 of 66
312.9 Steel Nail Plates No. 18
Plastic and copper or copper alloy piping penetrating framing
members to within 1" of the exposed framing shall be protected
by steel nail plates not less than ____________ in thickness.
312.9 Steel Nail Plates 1 1/2"
Steel nail plates shall extend along the framing not less than
_____ beyond the diameter of the pipe and tubing.
312.10 Sleeves Concrete & masonry walls
Sleeves shall be provided to protect piping through what kind of
walls?
313.3 Suspended Piping At every joint
No-hub cast iron piping in 5' lengths, installed horizontally
above ground, shall be supported _________.
402.5 Setting 12
No urinal shall be set closer than _____ inches from its center to 24
a side wall or partition or closer than _____ inches from center
to center.
2/5/2026 2
,Plumbing Code Exam 2026 3 of 66
402.5 Setting 15
No water closet or bidet shall be set closer than _____ inches 30
from its center to a side wall or obstruction or closer than _____
inches center to center to a similar fixture.
402.5 Setting 24
The clear space in front of a water closet, lavatory, or bidet shall
be not less than _____ inches.
402.6.1 Closet Rings (closet flanges) Top of the closet ring
Closet bends or stubs shall be cut off so as to present a smooth
surface, even with the ____________.
402.6 Flanged Fixture Connections carrier fitting
Wall-mounted water closet fixtures shall be securely bolted to an
approved ______ ______. The connecting pipe between ______
______ and the fixture shall be an approved material and
designed to accommodate an adequately sized gasket. Gasket
material shall be neoprene, felt, or similar approved gaskets.
402.10 Slip Joint Connections 12" x 12" access panel
A bathtub with slip joint connections that will be concealed shall
be provided with a minimum ____________.
2/5/2026 3
, Plumbing Code Exam 2026 4 of 66
404.2 Overflows House or inlet side of the trap
The overflow pipe from a fixture shall be connected on the
_______________.
407.2 Water Consumption 2.2 gpm
The maximum water use allowed in gallons per minute (gpm) or 8.3 lpm
liters per minute (lpm) for lavatory faucets, kitchen faucets, and
replacement aerators is _____ gpm/ _____ lpm
WSA: Washington State Amendments
407.2 Water Consumption 0.5 gpm
The maximum water use allowed in gallons per minute (gpm) or 1.9 lpm
liters per minute (lpm) for public lavatory faucets other than
metering is _____ gpm/ _____ lpm
WSA: Washington State Amendments
407.4 Metering Valves spring
Lavatory faucets located in restrooms intended for use by the water pressure
general public shall be equipped with a metering valve designed
to close by __________ or __________ when left unattended Exception: 1. Where designed and installed for use by persons with disability 2. Where
(self-closing). installed in day care centers, for use primarily by children under 6 years of age
WSA: Washington State Amendments
2/5/2026 4
