On Tue, 23 Feb 2016 18:03:12 +0000, Mike Tomlinson
wrote:


Another site clearly showing how ot use the Basin Mate:

http://www.ultimatehandyman.co.uk/ho...-waste-fitting

this is how I installed it (before finding this site.)

Hope this helps someone else struggling with the same problem. It seems
to be quite common.

Amongst people who don't understand how it all works though I'm
guessing (I'm not suggesting you fall into that category, you just
preferred not to use any sealant). Like the guy who told me he 'had
spent 3 hours trying to stop my mums new basin waste leaking' and I
managed it first go in 10 mins because I *understood* what was
required. He hadn't understood that the washer above the nut didn't
seal the nut.

From your link above:

"The manufacturers instructions for fitting this waste was to seal
around the pop up waste using silicone and then place it into position
and then fit the sealing washer to the bottom and then the large
plastic nut.

I did exactly as the instructions said and the waste leaked and so I
removed it and tried again using even more silicone and it leaked
again, then the retaining nut broke and so off I went to my local DIY
store and I found a much better solution for fitting the waste."

It leaked because they weren't sealing the right thing.

You *don't* need to seal the waste fitting where it goes into the
basin, other than to stop the water leaking out of the basin, past the
plug when it's in place.

You don't (normally) need to seal any other rings (like a non
integrated overflow connection), as long as you use appropriate
(suitably soft and not split) washers on both sides.

You do normally need some sort of sealant between the lower nut but
*only* on the thread.

So, if you assembled the entire fitting, ran a small bead of sealant
around the thread against the lower washer and then did the nut up
(even by hand), the chances are all would be fine (and you wouldn't
'have sealant everywhere' or the nut stuck on.

I and millions of plumbers have done it this way for many many years.

Cheers, T i m

p.s. If you already have the sealant out, many people would run a
smear round each of the mating surfaces 'just in case'.