The title says it all really, how acceptable is a change of direction on a long horizontal run of 110mm pipe? I want to create an ensuite in a house I'm working on, but unfortunately it's going to involve getting the soil pipe to the stack at the back of the house. About the only way I can manage this would be to run the soil pipe between the joists for about 2m, then have a change of direction of about 30 degrees to run the remaining 3.7m to the stack. The gradient would be constant throughout the run.
In an ideal world I'd much prefer a straight run, but unless I build a false floor of about 220mm I can't achieve it, and I really don't want to lose that amount of head height.
As an alternative, but probably even less likely to be acceptable, would it be possible to run the first section as above (ie 2m, between the joists), then drop down with a 92° bend and then resume the near horizontal run with another 92° bend immediately (or a 92° swept T to provide a rodding point?). This would be much easier to route but I can't see it as being acceptable.
Building control will be involved anyway as there's a lot of other things need doing, but I'd rather have an idea of what's likely to be acceptable before I see them.
In an ideal world I'd much prefer a straight run, but unless I build a false floor of about 220mm I can't achieve it, and I really don't want to lose that amount of head height.
As an alternative, but probably even less likely to be acceptable, would it be possible to run the first section as above (ie 2m, between the joists), then drop down with a 92° bend and then resume the near horizontal run with another 92° bend immediately (or a 92° swept T to provide a rodding point?). This would be much easier to route but I can't see it as being acceptable.
Building control will be involved anyway as there's a lot of other things need doing, but I'd rather have an idea of what's likely to be acceptable before I see them.
