PLUMBING CODE REQUIREMENTS AND
REGULATIONS EXAM QUESTIONS AND
ANSWERS 100% PASS 2026 EDITION
Manufacturer Identification - ANS Each length of pipe, fitting, trap, fixture, and device must
have clear manufacturer identification to ensure quality and compliance with safety standards.
Pipe Protection - ANS Pipes must be adequately protected from breakage when passing
under or through walls to prevent leaks and structural damage.
Copper Pipe Protection - ANS Copper must be protected horizontally - 6 feet or less on small
copper pipe and 10 feet or less on any copper piping 1.5 inches or larger.
Drainage Pipe Testing - ANS Drainage pipe shall be tested with a 10 foot head of water, or air
at 5 psi.
Plumbing Fixtures Material - ANS Plumbing fixtures must be made of approved, smooth,
impervious material.
Water Closet Placement - ANS Water closets shall be set no closer than 30 inches center to
center or 15 inches from a side wall.
Water Closet Bolts - ANS Water closet bolts shall be brass.
@COPYRIGHT 2026 ALLRIGHTS RESERVED 1
, Joint Sealing - ANS Joint where fixtures contact wall and floors shall be sealed water tight.
Fixture Overflows - ANS Overflows, if on a fixture, must drain to inlet (fixture) side of trap.
Access to Connections - ANS Access must be provided to concealed slip-joint connections.
Water Closet Tank Consumption - ANS Water closet tanks shall consume no more than 1.6
gallons per flush and have an anti-siphon ball cock with a refill tube to refill the trap seal.
Water Closet Bend Size - ANS 4x3 inch water closet bend is acceptable.
Shower Dimensions - ANS Shower must at least 30 inches by 30 inches.
Water Supply Size - ANS Water supply shall be a minimum of 3/4 inch and have a pressure no
greater than 80psi.
Water Hammer Control - ANS Water hammer caused by high velocity, quick closing valves, air
tanks and pumps shall be controlled by water hammer arrestors.
Copper Water Service Pipe - ANS Copper water service pipe must be a minimum of type M.
Pipe Reaming - ANS All pipe must be reamed to the full inside diameter of the pipe to
prevent turbulence.
Pipe Joint Compound Application - ANS Pipe joint compound shall be applied to male threads
only.
Lead-Free Solder - ANS Solder must be lead free (0.2% or less).
@COPYRIGHT 2026 ALLRIGHTS RESERVED 2
REGULATIONS EXAM QUESTIONS AND
ANSWERS 100% PASS 2026 EDITION
Manufacturer Identification - ANS Each length of pipe, fitting, trap, fixture, and device must
have clear manufacturer identification to ensure quality and compliance with safety standards.
Pipe Protection - ANS Pipes must be adequately protected from breakage when passing
under or through walls to prevent leaks and structural damage.
Copper Pipe Protection - ANS Copper must be protected horizontally - 6 feet or less on small
copper pipe and 10 feet or less on any copper piping 1.5 inches or larger.
Drainage Pipe Testing - ANS Drainage pipe shall be tested with a 10 foot head of water, or air
at 5 psi.
Plumbing Fixtures Material - ANS Plumbing fixtures must be made of approved, smooth,
impervious material.
Water Closet Placement - ANS Water closets shall be set no closer than 30 inches center to
center or 15 inches from a side wall.
Water Closet Bolts - ANS Water closet bolts shall be brass.
@COPYRIGHT 2026 ALLRIGHTS RESERVED 1
, Joint Sealing - ANS Joint where fixtures contact wall and floors shall be sealed water tight.
Fixture Overflows - ANS Overflows, if on a fixture, must drain to inlet (fixture) side of trap.
Access to Connections - ANS Access must be provided to concealed slip-joint connections.
Water Closet Tank Consumption - ANS Water closet tanks shall consume no more than 1.6
gallons per flush and have an anti-siphon ball cock with a refill tube to refill the trap seal.
Water Closet Bend Size - ANS 4x3 inch water closet bend is acceptable.
Shower Dimensions - ANS Shower must at least 30 inches by 30 inches.
Water Supply Size - ANS Water supply shall be a minimum of 3/4 inch and have a pressure no
greater than 80psi.
Water Hammer Control - ANS Water hammer caused by high velocity, quick closing valves, air
tanks and pumps shall be controlled by water hammer arrestors.
Copper Water Service Pipe - ANS Copper water service pipe must be a minimum of type M.
Pipe Reaming - ANS All pipe must be reamed to the full inside diameter of the pipe to
prevent turbulence.
Pipe Joint Compound Application - ANS Pipe joint compound shall be applied to male threads
only.
Lead-Free Solder - ANS Solder must be lead free (0.2% or less).
@COPYRIGHT 2026 ALLRIGHTS RESERVED 2
