can't secure waste into compression fit kitchen sink trap

28 Oct 2011
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United Kingdom
I'm trying to fit a 40mm FloPlast waste pipe to a 40mm FloPlast compression fit sink trap but can't get it to securely hold.

I put the rubber olive/washer onto the pipe, bevelled edge facing the fitting, insert the pipe and tighten the nut. All looks good, but the pipe can just be pulled out of the trap by hand, it offers hardly any resistance.

I'm new to this so any tips very gratefully received.
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You may be worrying too much. Sometimes it isn't that hard to pull the connections apart even when they've been perfectly watertight.

Provided the pipe is seated as far as it will go into the fitting and the tapered end of the rubber seal is facing the fitting you should get a good seal when the nut is hand tight.

The pipework should be held in place with clamps where possible to prevent any accidental separation.
Some traps have a plastic washer between the cone washer and nut! McAlpine have them without them the waste pipe just pulls out easily! They go missing from the packs very often in my local plumbers merchants!
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thanks both responses. I think you're right, I was being too cautious. I fitted it on Friday and no leaks so far.

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