Right here goes:
I am at the planning stage of totally refitting my bathroom.
I am by no means a 'Plumber' but have done some plumbing DIY stuff before.
I am moving the bath to the other side of the room, moving the sink to another wall, installing a new shower cubicle and am intending to have all the waste pipes under the floor boards (Yeah, I know that I am making life difficult and that if one leaks it will be difficult to get to and so on...)
The main questions I have are around the pipe gradient, siphonage, air blocks and all that stuff - I have read up about these on the internet and just end up getting more confused and scared of doing anything.
Anyway.......
The idea is to have the bath connected to the soil stack by itself - this will be above the floor boards as it will all be hidden by the bath panel as the soil stack is at the end of the bath. Then on the opposite side about a foot lower down will be the WC inlet into the soil stack. I then have a shower and a sink to route - I was going to run the shower waste under the floor boards and the join the sink waste onto the shower waste with a swept tee and then across to the soil stack. I was going to use 40mm pipes for this as they will have to be through the floor joists and think that 50mm holes in the floor joists sounds BAD!
The next problem I have is that the Shower/Sink waste will be at a similar height to the WC waste. It could go perpendicluar to the WC connection which I understand is OK? BUT where the WC joins the stack there there is a wider section of pipe (the Boss I believe it is called) so don't think I can attach to that so was going torun the pipes horizontally (with a gradient obviously) under the floor and then when it is close to the soil stack have a 90 degree bend sending the waste pipe vertical and parallel to the soil stack and then another 90 or 45 degree bend and then connect to the soil stack lower down avoiding the 200-250mm no go zone in relation to the WC connection above. Is this okay???? I have read that there are minimum and maximum gradients for waste pipes and maximum drops etc so I just wonder if having this vertical section before the soil stack would mean that I would exceed the maximum drop/gradient and end up with siphonage problems???? I have looked into HepVo valves to get around the siphonage problem but the shower is a low profile one and requires a high flow waste and therefore I don't think a HepVo would be compatable.
I do have some drawing to explain this all a bit better but I don't know how to post them yet.
Any responses welcomed.....
I am at the planning stage of totally refitting my bathroom.
I am by no means a 'Plumber' but have done some plumbing DIY stuff before.
I am moving the bath to the other side of the room, moving the sink to another wall, installing a new shower cubicle and am intending to have all the waste pipes under the floor boards (Yeah, I know that I am making life difficult and that if one leaks it will be difficult to get to and so on...)
The main questions I have are around the pipe gradient, siphonage, air blocks and all that stuff - I have read up about these on the internet and just end up getting more confused and scared of doing anything.
Anyway.......
The idea is to have the bath connected to the soil stack by itself - this will be above the floor boards as it will all be hidden by the bath panel as the soil stack is at the end of the bath. Then on the opposite side about a foot lower down will be the WC inlet into the soil stack. I then have a shower and a sink to route - I was going to run the shower waste under the floor boards and the join the sink waste onto the shower waste with a swept tee and then across to the soil stack. I was going to use 40mm pipes for this as they will have to be through the floor joists and think that 50mm holes in the floor joists sounds BAD!
The next problem I have is that the Shower/Sink waste will be at a similar height to the WC waste. It could go perpendicluar to the WC connection which I understand is OK? BUT where the WC joins the stack there there is a wider section of pipe (the Boss I believe it is called) so don't think I can attach to that so was going torun the pipes horizontally (with a gradient obviously) under the floor and then when it is close to the soil stack have a 90 degree bend sending the waste pipe vertical and parallel to the soil stack and then another 90 or 45 degree bend and then connect to the soil stack lower down avoiding the 200-250mm no go zone in relation to the WC connection above. Is this okay???? I have read that there are minimum and maximum gradients for waste pipes and maximum drops etc so I just wonder if having this vertical section before the soil stack would mean that I would exceed the maximum drop/gradient and end up with siphonage problems???? I have looked into HepVo valves to get around the siphonage problem but the shower is a low profile one and requires a high flow waste and therefore I don't think a HepVo would be compatable.
I do have some drawing to explain this all a bit better but I don't know how to post them yet.
Any responses welcomed.....