Recent content by niko

Many thanks for these responses. By 'ceiling void' I mean the gap above a flat ceiling and under a pitched roof - so there is lots of room and no joists to cut. Hopefully this should mean that I can achieve the optimum fall on the pipe.

I would like to add a new WC to a loft room in a house with a first floor bathroom with WC, and an additional WC on the ground floor. Both the existing WCs discharge to a soil stack at the rear of the house. It will be possible to connect the new WC in the loft to the existing soil stack, but my...