Hi,
Looking to add a toilet into an existing en suite that comprises of a sink and shower, at present the waste for both the shower and sink is a 40mm waste pipe that runs aprox 7m into the bathroom then out the exterior wall and into the stack (external), I would be looking to replace this 40mm pipe with 100mm but have a couple of questions.
1) Is a run this long allowed, I presume replacing the 40mm with larger diameter pipe would improve the run?
2) I am i right in thinking the pipe should drop 18mm every 1m, the joists are 8" deep so i should have around 3.5" to drop the run over its coruse.
3) Does the BCO have to inspect the work? In an ideal world i would just pull the existing pipe from the external wall, increase the diameter of the hole in the wall and feed the pipe through its orginal path from the outside of the house ( I am sure something under the floor will stop me, but its worth a try).
4) Any other potential pitfalls or suggestions?
Looking to add a toilet into an existing en suite that comprises of a sink and shower, at present the waste for both the shower and sink is a 40mm waste pipe that runs aprox 7m into the bathroom then out the exterior wall and into the stack (external), I would be looking to replace this 40mm pipe with 100mm but have a couple of questions.
1) Is a run this long allowed, I presume replacing the 40mm with larger diameter pipe would improve the run?
2) I am i right in thinking the pipe should drop 18mm every 1m, the joists are 8" deep so i should have around 3.5" to drop the run over its coruse.
3) Does the BCO have to inspect the work? In an ideal world i would just pull the existing pipe from the external wall, increase the diameter of the hole in the wall and feed the pipe through its orginal path from the outside of the house ( I am sure something under the floor will stop me, but its worth a try).
4) Any other potential pitfalls or suggestions?
