Unvented System Discharge Pipe

[keep_it_simple]

Hi all. Is it OK to feed the discharge pipe from an unvented system such as a Megaflo into a 40mm plastic shower waste pipe (or linear shower drain) which in turn feeds into the soil stack?

I was thinking of a run along these lines: Unit - metal pipe - tundish - metal pipe - shower drain/waste pipe - soil stack.

Thanks.

 

[ChrisR]

No. See building regs G3

 

[micky p]

not many plastics you can run a discharge into. They need to be able to take temps of 100 deg C + so copper is better.

 

[HarrogateGas]

Depends on Manufacturer............Santon states the discharge shoud be run PREFERABLY in metal and termaniate PREFERABLY to outside but it does state that where this is not possible it CAN terminate in waste plumbing as long as the tundish is visible. Reading into that i would say it can go into waste pipe but is not good practise.

 

[corgiman]

Yes you can as long as you use a hep2o trap thing I forget the name

and as has been said in a appropriate temp resistant plastic

sheesh this is as stupid a rule as the fecking tundish

 

[ChrisR]

I stand corrected. Somethng else I've learned form this forum!

 

[chrishutt]

I think PP (polypropylene) pipe is specified for such applications, to cope with the potentially high temperatures. But don't forget that such work should only be done by someone with the unvented ticket.