On 23/02/2016 09:02, T i m wrote:
On Tue, 23 Feb 2016 08:49:47 +0000, Mike Tomlinson
wrote:


Replaced the taps and 'push lever' waste on a bathroom sink with new
monobloc tap and clicky waste yesterday, but can't get the lower seal on
the waste to, um, seal. The upper seal (to the basin) is fine.

It's one of those combined waste and overflow things with a couple of
notches cut out in the waste body for the overflow. Everything is fine
until I allow water into the overflow, at which point the lower seal
leaks. The actual seal to the bottom of the basin seems to be good, it
seems to be water escaping through the threads of the waste.

What am I missing here? Surely it should be possible to get a good seal
without having to bodge it with silicone?

How though? There are no mating / natural sealable surfaces under the
overflow part and those threads are a fairly loose fit.

There are many instances where you have to seal threads be it with
fluids or gasses.

Thanks for any tips.

Any suitable sealant. There is no pressure and hopefully won't be
used.

Cheers, T i m


If there's a washer of any sort involved, I'd replace that from my pack
of Aldi 500 assorted washers (reducing it to 499). Seriously, the washer
in waste compression joints often looks ok but isn't.