I would like to create a new en-suit on the first floor, because the only bathroom in the house is on the ground floor and the house has a private drainage system so it is not straight forward.

I can run hot and cold supplies to the room no problem but the issue I have is the drainage (particularly for the WC).

If I use a saniflo then what could I join the output to. The house has no water services on the first floor so it does not have a soil stack (and I would rather not have one because it would change the look of the outside) and the ground floor WC has the soil pipe coming out of the floor.

I am guessing that I can't join the output to the sink, bath or basin waste pipe?

What options do I have?

Mark.

You should not joint to the bath,basin or bath waste pipe, but where do these run to? A gulley or into a soil pipe?

Jason

I meant pipe wise, what do they run to. It is unlikely that they run all the way to the tank in 32/40mm waste, they must go into a 100mm pipe somewhere.

Jason