Texas Plumbing Tradesman | Questions with 100% Verified Answers | Latest Update 2026/2027

Texas Plumbing Tradesman | Questions with 100% Verified
Answers | Latest Update 2026/2027
Question: Access cover
Answer: 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.

Question: Air Admittance Valve (AAV)
Answer: One-way valve designed to allow air to enter the plumbing drainage system when negative pressure
develops in the piping system.

Question: Air Break (Drainage System)
Answer: 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.

Question: air gap
Answer: 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)

Question: Area Drain
Answer: A receptor designed to collect surface or storm water from an open area

Question: Backflow
Answer: 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.

Question: Back siphonage
Answer: backflow due to negative pressure

Question: Back water valve
Answer: a device installed in a drainage system to prevent reverse flow .

Question: branch
Answer: any part of the piping system other than a main, riser or stack.

Question: Branch interval
Answer: A VERTICAL LENGTH OF SOIL OR WASTE STACK at least 8 ft in height, between the connections of
horizontal branches to a drainage system.

Question: Branch vent
Answer: A vent connecting one or more individual vents with a vent stack or stack vent

Question: Building Drain
Answer: 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.

, Question: Building sewer
Answer: "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."

Question: Cleanout
Answer: An access opening in the drainage system utilized for the removal of obstructions.

Question: conductor
Answer: A pipe inside the building that conveys storm water from the roof to a storm drain.

Question: contamination
Answer: And impairment of the quality of the potable water that creates an actual hazard to the public health

Question: cross-connection
Answer: Physical link between safe water and dirty water

Question: FIXTURE BRANCH
Answer: A drain serving two or more fixtures that discharges to another drain or to a stack.

Question: FIXTURE DRAIN
Answer: Conveys the discharge of only a single trap and can consist of both horizontal and vertical sections of
pipe.

Question: Fixture Supply
Answer: water supply pipe connecting the fixture with the fixture branch

Question: Flood level rim
Answer: The edge of the receptacle from which water overflows

Question: Horizontal pipe
Answer: Pipe or fitting that is installed in a horizontal position, angle of less than 45 deg with the horizontal
plane.

Question: Indirect Waste Pipe
Answer: A waste pipe that DOES NOT CONNECT DIRECTLY with the drainage system but that discharges into
the drainage system through an air break or gap into a trap..

Question: Individual vent
Answer: A pipe installed to vent a fixture trap and that connects with the vent system above the fixture served
or terminates in the open air

Question: LEAD-FREE PIPE AND FITTINGS
Answer: Containing not more than 8.0 percent lead.

Question: LEAD-FREE SOLDER AND FLUX
Answer: Containing not more than 0.2 percent lead