New WC

[rabi]

My 1950s mid terrace house has a WC on a half landing at the front of the house & discharges into a combined sewer/drain at the front. The bathroom is upstairs at the rear & drainage from the bath & sink, drain into a drain at the rear. First question, is it likely that the bathroom drains go under the house & into the combined sewer/drain? secondly if so could I install a WC in the bathroom to discharge into the drain incorporating the correct pipework etc. I would be using a qualified builder/plumber.

 

[^woody^]

Drainage tends to out towards and under the nearest external wall, and not travel under the house.

Yes a plumber's job, but you may struggle to get a plumber that wants to lay new drains, so a general builder who is good at plumbing - again to may struggle with that.

Building regulations approval would be needed.

 

[rabi]

Thanks for the reply Woody, I've had my hand down the gulley for the waste water & roof downpipe at the rear of the house, & the gully outlet does seem to head under the house. The drainage plan for the street only shows a "combined sewer" (solid red line) at the front of the property & is annotated "Both surface water and foul sewage flow in the same pipe" There are no dashed blue lines to indicate a surface water sewer or a dashed red line to indicate a foul sewer on the plan.

 

[^woody^]

Generally, sewer maps are unreliable. Unless the layout and location is patently obvious, the only way to be sure is to have a CCTV survey done