Hi, advice please! We want to install an ensuite in an existing bedroom. We've have obtained 4 estimates, 3 of the four plumbers said it's not possible to install a proper toilet as the soil stack is too far away; they suggested a Saniflow (which we want to avoid if poss). The fourth plumber has suggested running a soil pipe through the interior wall behind the WC and under the adjoining bedroom's floor and then through the outside wall to join the existing soil stack. The soil pipe would run for approx 12 feet under the floorboards. Does this sound safe? Is it OK to have a soil pipe run under a bedroom floor - is there a danger it could smell, leak etc? Would we have to get permission to do this from the council?
Many thanks!
Many thanks!