Leak underneath bathroom sink

bjorn_toby_wilde

stuart45 said:

All the plumbers I know sling that foam washer away and use sealant. They also get the backnut tighter than hand tight.

Agree about the foam washer, although they seem to work ok on stainless sinks. The nut doesn’t need to be that tight though.  The water’s not under pressure after all. Overtightening is probably how that one got split

stuart45

They normally tighten them up by hand, and them nip them a bit with the pump pliers. 

Baggypuss

I have a pop up plug/waste. Did go into B&Q, but no nut available unless I got whole waste set. At the time, I did not bring original set to find size/type. Also regarding tools  I do not have wench/spanner that could open wide enough to go around a retainer nut - so may need to borrow one.

Baggypuss

There is an overflow hole in the basin side like below 

Baggypuss

I will also look at Alpine brand

bjorn_toby_wilde

In that case you need a waste like this

https://www.screwfix.com/p/flomasta-slotted-pop-up-basin-waste-chrome-plated-brass-32mm/168JN?tc=VC2&gclsrc=aw.ds&gad_source=1&gad_campaignid=22599672207&gbraid=0AAAAAD8IdPyMF8jOTAXfg3jHsbbeCozmZ&gclid=EAIaIQobChMI-sr5kML5jgMV_qVQBh0TtDVoEAQYAiABEgLXS_D_BwE

Take the original with you to check size.

Baggypuss

Many thanks