plumbing level 2 terms 100% Correct

additional circuit vent - ANSWER-a vent pipe that Is installed between a circuit vent and a relief vent to provide additional air circulation. air admittance valve - ANSWER-a one way valve designed to allow air to enter the drainage systemm when the pressure in the plumbing system is less than the atmospheric pressure air break - ANSWER-the unobstructed vertical distance between the lowest point of an indirectly connected soil-or-waste pipe and the flood level rim of the fixture into which it discharges air gap - ANSWER-the unobstructed vertical distance through air between the lowest point of a water supply outlet and the flood level rim of the fixture or device into which the outlet discharges alloyed zinc - ANSWER-an alloy of zinc having the corrosion resistance and physical properties of an alloy conataining .15% titanium, .74% copper and 99.11% zinc, and so tempered as to be capable of being formed into the shape required for a watertight joint. auxiliary water supply - ANSWER-any water supply on or available to the premises other than the primary potable water supply. backflow - ANSWER-a flowing back or reversal of the normal directions of the flow backflow preventer - ANSWER-a device or a method that prevents backflow back pressure - ANSWER-pressure higher than the supply pressure backsiphonage - ANSWER-backflow caused by a negative pressure in the supply systems back siphonage preventer (or vacuum breaker) - ANSWER-a device or a method that prevents back siphonage Backwater valve - ANSWER-a check valve designed for use in a gravity drainage system bathroom group - ANSWER-a group of Plumbing fixtures installed in the same room, consisting of one domestic type lavatory, one water closet and either one bathtub (with or without a shower) or one one-head shower