Sink drain leak

Joined
29 Nov 2012
Messages
44
Reaction score
0
Location
Manchester
Country
United Kingdom
Hi all,

Pedistal sink with very small leak from sealant between where sink connects to drain.

Would putting some silicone over the top seal it for a reasonable time? Or do I need to take it apart and redo?
 

Attachments

  • image.jpg
    image.jpg
    190.7 KB · Views: 37
Sponsored Links
Joined
24 May 2016
Messages
3,530
Reaction score
639
Country
United Kingdom
If you mean where the white plastic nut tightens then no more than a rubber seal is required there.
Sealant on top wont do anything.
 
Joined
29 Nov 2012
Messages
44
Reaction score
0
Location
Manchester
Country
United Kingdom
Sorry I wasn’t clear it is leaking from the sealant where the metal attaches to the sink a bit higher up.
 
Joined
24 May 2016
Messages
3,530
Reaction score
639
Country
United Kingdom
Ah! I spied white above the plastic nut and thought ...............

It needs the sealant removed and redone.
 
Sponsored Links
Joined
6 May 2010
Messages
1,712
Reaction score
658
Location
London
Country
United Kingdom
1. The slotted waste has one part in the basin which is screwed into the metal part below the basin seen in your photograph.
2. The part in the basin has a fairly wide lip, and between this lip and the upper side of the ceramic basin is a seal. This can be the seal that came with the waste fitting, usually a (fairly useless) foam type washer. Alternatively, the above sink part may have been sealed to the upper side of the basin with Plumber's Mait or silicone.
3. The part below the basin also has a seal between its flanged top edge and the underside of the basin. This is usually a white or black rubber sealing washer.
4. The only reliable way to get rid of that leak is to remove the upper waste fitting, and replace the upper or lower seals or both.
5. If you get a Monument slotted waste tool, you may be able to remove the upper (in basin) part of the waste fitting. This should then give you enough access to replace both seals, although I don't know where you can get the under basin seals.
6. My preference is for Plumbers Mait to make the upper seal. Roll a thin (less than chipolata) "sausage" of Plumber's Mait, and place it in a circle around the upper waste part, under the flange. Screw the upper part into the lower part, and tighten. As the Plumber's Mait squeezes out, remove the surplus with a non-metallic scraper. When finished, last traces can be remove with white spirit. Check that the sealant has not blocked the slots into the hollow basin, which would stop the overflow working.
7. Before trying the above, it might be worth using the tool to just tighten the upper part into the lower. You might be lucky and seal the leak.
 
Joined
15 Jun 2012
Messages
3,036
Reaction score
474
Location
Southampton
Country
United Kingdom
Looks like the White nut is possibly cross threaded causing pressure on the basin seal .
 
Joined
22 Aug 2022
Messages
1
Reaction score
0
Country
United States
Hi, OP! I agree with oldbuffer. You can try tightening the upper part into the lower first, as it might fix the issue. If not, make sure that the silicone is cured before running water. Here's where you can learn more about how to fix a leaking sink drain.
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Sponsored Links
Top