J
jashton
The building regs specify a maximum horizontal soil pipe run of 6m "when connected to a single WC"
Can someone please explain what they're getting at? The phrase "when connected to a single WC" is a bit vague, in that it doesn't give an reason as to why.
I'm planning an extension and it's going to place my existing WC more than 6 metres from either of my exterior side walls.
The direction I want to run the pipe means an 8 metre horizontal run, at first floor level, then into a vertical stack. Is this doable? Along with the WC there will be a basin and bath going into the same horizontal run at its starting point.
I understand the logic of long runs being (I assume) that the volume discharged by the WC won't be sufficient to clear the pipe if it's >6 metres. What I don't get is why you can have a run of >6 metres for an underground pipe. Surely the same logic re water volume would apply. Is there an assumption that other water will be flowing into the underground, helping keep it flushed? If so does the fact that I will have a bath and basin waste on my pipe help its chances of exceeding 6 metres?
Or am I wrong re water volume and the restrictions are related to air flow? I can put a vertical vent stack right outside the bathroom so venting the pipe at source isn't a problem
Thanks
Can someone please explain what they're getting at? The phrase "when connected to a single WC" is a bit vague, in that it doesn't give an reason as to why.
I'm planning an extension and it's going to place my existing WC more than 6 metres from either of my exterior side walls.
The direction I want to run the pipe means an 8 metre horizontal run, at first floor level, then into a vertical stack. Is this doable? Along with the WC there will be a basin and bath going into the same horizontal run at its starting point.
I understand the logic of long runs being (I assume) that the volume discharged by the WC won't be sufficient to clear the pipe if it's >6 metres. What I don't get is why you can have a run of >6 metres for an underground pipe. Surely the same logic re water volume would apply. Is there an assumption that other water will be flowing into the underground, helping keep it flushed? If so does the fact that I will have a bath and basin waste on my pipe help its chances of exceeding 6 metres?
Or am I wrong re water volume and the restrictions are related to air flow? I can put a vertical vent stack right outside the bathroom so venting the pipe at source isn't a problem
Thanks
