Grey waste to Soil pipe connection

Joined
4 Mar 2008
Messages
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Location
Gloucestershire
Country
United Kingdom
Hi,

I have two questions about running and connecting grey water waste pipes.

1)
I'm self-building and can't be sure from what I've seen of the regs,
regarding whether I can connect the white waste pipes,
(from washing machine + shower + sink)
internally via a final/additional "U" trap, and then a boss, onto the soil pipe behind the toilet, before this exits the floor and crosses the wall below grade.
(Single storey timber frame on block and beam floor)

2)
How is the "maximum pipe run" defined?
I'm "daisy-chaining" the machine, shower, and sink, but the final run is looking like being 2.8m which is over the limit.
Can I "break" this with, say, an additional capped swept "T"?
I'm intending to have a capped swept "T" as an access point at each turn in the run)

All advice very much apreciated.
Thanks.
 
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