Hi All
Still trying to make some sense of the venting arrangements for my drains in order to make the local Building Control bods happy and get that all-important Completion Certificate.
So - I have a septic tank down at the bottom of the garden - and a long-ish pipe run down to it. At the highest point there's an earthenware 4" pipe which looks as if a 4" plastic vent pipe once went straight up inside the bathroom and out through the roof.
Since then, a previous owner has removed the vent pipe and replaced it with an air-admittance valve, at floor level.
Building Control want to see the AAV removed and a 'real' vent open to the air reinstated.
Because it's in a very obvious position (in an alcove with the washbasin / large mirror etc) I'm keen to make the whole thing look as unobtrusive as possible. Apparently I can go from 4" to 3" pipe once I'm above the level of the basin overflow - this will help a little with the appearance and getting the inevitable boxing-in to be as close to the wall as poss .
Because it's not easy catching up with the Building Bods as they're apparently understaffed and running about on sites all day - I'm asking here
So - a few questions :-
a) Is it possible to get an offset adapter to go from 4" to 3" - "in-line" ? b) Am I going to have problems obtaining 3" pipe & fittings ? c) Can the pipe pass out through the gable end of the bungalow (I know about the restrictions re opening windows) - or does it have to go out through the roof ? d) If it goes through the roof - is this just a matter of removing a concrete tile and fitting one of those 'ali-sheets-with-a-rubber-collar' efforts - does the ali sheet replace the tile ??
Many thanks in advance Adrian Suffolk UK ======return email munged================= take out the papers and the trash to reply