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Plumbing

Saniflo waste connection to 40mm waste pipe

Anonymous user 28/02/2024 - 2.50 PM

I am installing an ensuite into a bedroom above our downstairs utility room. I need to use a saniflo for the toilet because there is no 100mm stack pipe above the utilty room or conveniently close to the bedroom. However, I can connect the waste from the sink and shower straight down into a 40mm waste pipe in the corner of the utilty. Can I also connect the outlet from the saniflo into this 40mm waste pipe? Or do I have to take it up through the loft and about 7 metres along to a 100mm stack pipe above the bathroom? Obviously it would be a lot easier just to connect it into the 40mm waster pipe, if allowed.

Are you a tradesperson and able to answer this question?

1 Answer

Anonymous user

Hi You would need to run the pipe from the saniflo outlet directly to the main 100mm waste pipe without any Tees for any other connections. If you connect the sink and shower to it, worse case, all the "human waste" from the saniflo will come out of the shower and/or sink. At best the force of the saniflo will suck the trap water in the shower and basin traps leaving you exposed to smells all the time.

Answered9 April 2012