Hi Everyone, Currently my soil stack runs through the sloping roof extension of my house, I am planning on replacing the flashing and am looking to fit a air admittance valve in the roof space so I don't have to shape the new lead around the pipe and seal the existing hole for the pipe. My questions are can I do this and would I have to fit a roof vent or is the eves ventilation adequate? Only the toilet is connected to the stack. Thanks in advance Richard
is this a stack at the end of the drain run? if so leave the open vent as is. as for venting sitck a tile vent in to be sure.
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