waste pipe specs

Joined
12 Feb 2005
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United Kingdom
Can someone tell me what the maximum allowed runs are for 32mm,40mm and 50mm for gravity waste, please. Also what are the flow capacitys. Basicly what are the rules on waste runs other than the fall. Ta.
 
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Cool. Don't happen to know how far you can go in 4inch before you need to do a stub-stack with Air admitance valve? Cheers
 
Cool. Don't happen to know how far you can go in 4inch before you need to do a stub-stack with Air admitance valve? Cheers
 
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