I need help on where to intstall an air-admittance valve. I remodeled an old home and completely gutted the whole thing. I have installed new plumbing throughout and used the old stack location. There is only on bathroom and it includes a shower, a clawfoot tub, a pedestal sink and a toilet. The toilet is located exactly where the stack is. The rest of the fixtures do not have any vertical pipining that is vented to the stack. I know that I need an air-admittance valve, but I am not sure where to intsall it at. I have not hooked up the sink yet and the pipe will go right into the wall. is it possible to install the valve right after the trap, just before the pipe enters the wall? Also, if I use a valve capable of 160 DFU's, will that be sufficient for the entire bathroom? I have the same question with the kitchen. The sink isn't installed yet, but I have the drain opening coming through the drywall with no access behind. Can I install the valve under the sink in the cabinet
Answers:
install the A A V in a place where you can access it
it must be on each fixture
the toilet must have a vent to the stack ( A A V not allowed )
each A A V must be at minimum 6 inches above the weer of the trap (the highest part of the trap where it turns lateral is the weer )
hope that helps
local codes may vary check your code book
Other answers:
thats a little beyond my level of expertise but check this web site
thats a little beyond my level of expertise but check this web site
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