Leak under bathroom sink (pic)

27col

Anyone who thinks that is not a standard part is obviously not a plumber.The job is so simple that it is hard to imagine why anyone would need to employ a "plumber" to do it at all.

aboard_epsilon

The traps are designed to be taken apart many times to clear crap out of them ..sealing with silicon, a belt and braces repair is not good.

your plumber is backwards.

all the best.markj

DirectDebacle

My guess is that it isn't the trap but a failure of the seal between the basin and waste. OP test for this by wiping away any water around the waste and trap nuts and then put the plug in and let some water into the basin. If after a while the water level in the basin goes down and or there is water appearing on the trap nuts as per your photos then you should be able to feel water above the top nut on your trap, around the threads of the waste or even where the waste nut meets the china basin. If that is the case then the waste needs to be removed, cleaned up and re-fitted with new sealant and washers. I use a good 'sausage of Plumbers Mait' under the plug flange (inside the basin) but don't use so much it blocks the o/flow inlet (if there is an o/flow) to the waste.

Just trying to nip up the waste nut may or may not work but perhaps worth a try if you don't fancy dismantling the waste.

Aquatronixjenny

Don't use leak seal on a waste!!! Its my worst nightmare to turn up to sort someones waste pipes out and find that some moron has shoved a load of silicone sealant or lsx around it. A decently fitted waste pipe should go straight on and not leak. If it leaks, its not fitted properly.

Check that it all goes together without having to force it. It could be that one of the pipes has been cut a bit too long which is causing strain on the joint.
Check that the seals are present (and the right way up)
Check that its not the basin seal leaking (where the waste fits onto the bottom of the basin)

Its a standard part, available in all DIY stores and should take 10 minutes tops to replace it.

Canucklehead

Hi,

You might find that the top nut that connects to the BASIN waste needs cutting down by 5mm or so.
The threads on pop up wastes are not long enough and the trap nut gets tight before the rubber seal meets the waste.

Water will run down and give the appearance that the lower joint leaks as well.

Leak sealer and silicon have the reverse effect as the rubber seals tend to slip out of position with the lubricating effect of them.

Or it might be a complete bodge.


GSR.

olias

Canucklehead wrote: »

Or it might be a complete bodge.

Right again as usual Canucklehead!

Olias