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OK to run/discharge old WC cistern overflow into sink waste pipe?

Agile said:
To comply with water regulations any overflow should run through a tun dish in an accessible location AND the discharge point should be protected from foul smells in the drainage system by a water trap or a fanny flap.

Tony
Click to expand...
Only the case when overflow pipe/s are discharged straight to drain.
Why are you giving advise on plumbing related matters?
 
Last edited:
dilalio said:
Ok, it's a low level cistern not a close coupled! Should be fairly straight forward to replace the flush with an internal overflow one.
Obviously you can't discharge the overflow into the basin cos it's higher!
This is another option...

Grrrr: can't paste link!
Click to expand...

So it's not necessary to take cistern off the wall to fit new flush?
 

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