combining waste drains backflow problem Drainage and wastage systems and plumbing help, advice and answers

[candoanythingbutthis]

Im wanting to combine my shower waste drain to my bath waste drain, the problem is i dont want to pull the plug on the bath and the waste water bubble up through the shower tray. The shower waste pipe is 40mm and the bath 32mm is there a non return push fit device available
that i could fit if anyone has any pointers it would be really appreciated.

[stoneyboy]

candoanythingbutthis,
Probably a Hep2o trap would work well but make sure you fit it in the correct orientation.
end

[TheDoctor5]

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