crown - vented traps\nare recommended on the upper floors of houses\nare used on double trap situations\nare…

crown - vented traps\nare recommended on the upper floors of houses\nare used on double trap situations\nare not permitted in most areas\nare always more than two pipe diameters from the trap\nare used on drum traps\nquestion 24\na trap primer\nis used on every trap\nrequires an air gap\nprevents traps from freezing\nuses mineral oil\nprevents traps from siphoning

crown - vented traps\nare recommended on the upper floors of houses\nare used on double trap situations\nare not permitted in most areas\nare always more than two pipe diameters from the trap\nare used on drum traps\nquestion 24\na trap primer\nis used on every trap\nrequires an air gap\nprevents traps from freezing\nuses mineral oil\nprevents traps from siphoning

Answer

Brief Explanations:

Crown - vented traps are typically used in double - trap situations to ensure proper venting and prevent siphoning. A trap primer is used to prevent traps from siphoning by maintaining the water seal in the trap.

Answer:

For the first question: are used on double trap situations For the second question: prevents traps from siphoning