I'm trying to find a solution for replacing a Saniflo in an ensuite bedroom. It's a biggish, late Victorian house, and I need to get the soil pipe from the front to the back of the house. I can run the first part of the pipe in the floor as the joists run the right way, but for the second section the joists run the other way so I need to drop down and run under the joists. This section will be in an already boxed in area (the top of some built in cupboards) so won't be visable, and if I run the first section in the floor there will be no ugly boxing in in the room below, and no need to disturb the ceiling which hopefully will mean less noise transference when the loo above is used.
So, is it a big no-no to have a horizontal (well, with an appropriate fall) section, then 2 x 135° bends to lower the pipe and then another horizontal run? I know it's not ideal, but it's the best route I can find for a 4" pipe through the house.
So, is it a big no-no to have a horizontal (well, with an appropriate fall) section, then 2 x 135° bends to lower the pipe and then another horizontal run? I know it's not ideal, but it's the best route I can find for a 4" pipe through the house.