Plumbing - vent boot

[Danny]

Question:  What sort of boot would a person place over the PVC vent pipe coming through the bus roof?

Thanks,
Danny

[pipes]

A cowboy boot ? It already smells bad ! SORRY couldn't resist that one..

[Tony LEE]

Don't know if you have them here, but I used a PVC flange (slips over the pipe and is a wide flange for sealing to the bathroom floor) -- moulded to the shape of the roof using a heat gun and then seal it down to the roof and around the pipe with paintable sealant (Sikaflex).

Because of the expansion of the pipe and because my method stopped movement at the roof, the vent pipe had a 90 degree bend just below the floor to allow movement.

Possible disadvantage is if I ever wipe it off, it may be a bit harder to unstick the flange to repair the pipe -- although I guess if I ever do crunch the top, the vent pipe is going to be the least of my problems.

[oldmansax]

I used what is commonly called a "roof jack" and available at any plumbing supply house. It is made from sheet metal with a rubber "boot " to fit the size pipe you are using. It can be formed to match your roofline.

HTH,  TOM

[belfert]

They make special vent covers for RVs and any RV dealer will have them.  Mine cost a whole $1.50.

They do allow the pipe to expand/contract.

Brian Elfert

[H3Jim]

Since I used 2" vent pipe, I used the rubber grommet that is normally used to seal a 2" pipe in a waste tank.   It seals very well, and yet the pipe can still be moved if necessary.  On top, I used a common RV vent cap with a built in venturi, so it tends to suck out gases.  Not leaks in several years, inexpensive, and the vent works very well too.

[TomC]

I just sealed my vents with silicone.  Haven't leaked in 12 years.  Good Luck, TomC