Hi,
My property's soil stack has a single entry for the toilet waste. Then a separate hopper and downpipe which drains into a gulley to collect waste water from the basin, shower and bath. Photo attached for reference.
I'm in the process of lowering the waste pipes and wondered whether I could combine the pipes going into the hopper so that only one pipe comes out the wall. Could I tee into the bath waste pipe (50mm) with the shower (40mm) and basin (32mm). I know venting is normally an issue with this when going directly into the stack.
My question is whether this applies to waste pipes going in to an open air hopper? Does this act as a vent? Or will I still potentially have issues with siphoning p-trap water from any of the combined fixtures?
Thanks in advance,
Tommy
My property's soil stack has a single entry for the toilet waste. Then a separate hopper and downpipe which drains into a gulley to collect waste water from the basin, shower and bath. Photo attached for reference.
I'm in the process of lowering the waste pipes and wondered whether I could combine the pipes going into the hopper so that only one pipe comes out the wall. Could I tee into the bath waste pipe (50mm) with the shower (40mm) and basin (32mm). I know venting is normally an issue with this when going directly into the stack.
My question is whether this applies to waste pipes going in to an open air hopper? Does this act as a vent? Or will I still potentially have issues with siphoning p-trap water from any of the combined fixtures?
Thanks in advance,
Tommy
