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Texas Plumbing Tradesman Questions
and Answers Latest 2026
Access cover Ans: A removable plate, usually secured by
bolts or screws, to permit access to a pipe or pipe fitting
for the purpose of inspection, repair or cleaning.
Air Admittance Valve (AAV) Ans: One-way valve designed
to allow air to enter the plumbing drainage system when
negative pressure develops in the piping system.
Air Break (Drainage System) Ans: An arrangement in
which a discharge pipe from a fixture, appliance or device
drains indirectly into a receptor below the flood-level rim
of the receptor, and above the trap seal.
air gap Ans: Indirect waste arrangement where the waste
is discharged to the drainage system through piping that
terminates at a specific distance above the flood level
rim. ( 2 times the pipe size, never less than 1 inch)
Area Drain Ans: A receptor designed to collect surface or
storm water from an open area
Backflow Ans: Unwanted reverse flow of contaminants
through a cross-connection into a potable water system.
It occurs when the pressure in the potable water supply
drops below the pressure of the contaminated supply.
Back siphonage Ans: backflow due to negative pressure
© 2025 All rights reserved
, 2 | Page
Back water valve Ans: a device installed in a drainage
system to prevent reverse flow .
branch Ans: any part of the piping system other than a
main, riser or stack.
Branch interval Ans: A VERTICAL LENGTH OF SOIL OR
WASTE STACK at least 8 ft in height, between the
connections of horizontal branches to a drainage system.
Branch vent Ans: A vent connecting one or more
individual vents with a vent stack or stack vent
Building Drain Ans: That part of the lowest piping of a
drainage system that receives the drainage from soil,
waste, and other drainage pipes inside and extends 2 to 5
feet beyond the exterior of the building.
Building sewer Ans: "That part of the drainage system
that extends from the end of
the building drain and conveys its discharge to the public
sewer,
private sewer, individual sewage disposal system or other
appropriate
point of disposal."
Cleanout Ans: An access opening in the drainage system
utilized for the removal of obstructions.
© 2025 All rights reserved
Texas Plumbing Tradesman Questions
and Answers Latest 2026
Access cover Ans: A removable plate, usually secured by
bolts or screws, to permit access to a pipe or pipe fitting
for the purpose of inspection, repair or cleaning.
Air Admittance Valve (AAV) Ans: One-way valve designed
to allow air to enter the plumbing drainage system when
negative pressure develops in the piping system.
Air Break (Drainage System) Ans: An arrangement in
which a discharge pipe from a fixture, appliance or device
drains indirectly into a receptor below the flood-level rim
of the receptor, and above the trap seal.
air gap Ans: Indirect waste arrangement where the waste
is discharged to the drainage system through piping that
terminates at a specific distance above the flood level
rim. ( 2 times the pipe size, never less than 1 inch)
Area Drain Ans: A receptor designed to collect surface or
storm water from an open area
Backflow Ans: Unwanted reverse flow of contaminants
through a cross-connection into a potable water system.
It occurs when the pressure in the potable water supply
drops below the pressure of the contaminated supply.
Back siphonage Ans: backflow due to negative pressure
© 2025 All rights reserved
, 2 | Page
Back water valve Ans: a device installed in a drainage
system to prevent reverse flow .
branch Ans: any part of the piping system other than a
main, riser or stack.
Branch interval Ans: A VERTICAL LENGTH OF SOIL OR
WASTE STACK at least 8 ft in height, between the
connections of horizontal branches to a drainage system.
Branch vent Ans: A vent connecting one or more
individual vents with a vent stack or stack vent
Building Drain Ans: That part of the lowest piping of a
drainage system that receives the drainage from soil,
waste, and other drainage pipes inside and extends 2 to 5
feet beyond the exterior of the building.
Building sewer Ans: "That part of the drainage system
that extends from the end of
the building drain and conveys its discharge to the public
sewer,
private sewer, individual sewage disposal system or other
appropriate
point of disposal."
Cleanout Ans: An access opening in the drainage system
utilized for the removal of obstructions.
© 2025 All rights reserved
