Community Forums

Mogulite · 06-13-2020, 11:50 AM

I have a leak at the trap under my kitchen sink. I’ve tried two different sealants and and plumbers tape with no luck. What am I missing?

It’s at the spot where the white sealant is. This picture is flipped sideways. Sorry

akeagle · 06-13-2020, 11:55 AM

You could have a cracked fitting. New P-traps are pretty cheap. Might be worth simply replacing the old one.

Spk64 · 06-13-2020, 11:58 AM

If it is a normal P-trap fitting it should not require sealant. As mentioned need to look for a crack or damaged sealing surface.

Old Scout · 06-13-2020, 11:58 AM

...those type of sink pipe joints usually have an inner gasket that seals the two pipes--could be missing, torn, or misaligned....

engine103 · 06-13-2020, 01:16 PM

Is the connector ring on upside down?

Mogulite · 06-13-2020, 04:26 PM

Thanks, I located a plumbing store and I’m going to attempt replacing it.

Headshaker · 06-13-2020, 04:55 PM

Does it have a gasket In between

Gary RVRoamer · 06-13-2020, 06:15 PM

As others have said, it shouldn't use either sealant or tape. The joint uses a compression washer which is forced to a tight seal as the threaded coupler is tightened down. You probably just need a new washer, but replacing the trap, which should come with a new washer, isn't expensive and makes sure you have all good parts.

Old Scout · 06-13-2020, 06:25 PM

….if you plan to replace it--first challenge will be finding ABS vs PVC pipe....

Dutch Star Don · 06-13-2020, 07:27 PM

I would look to make sure the sealing gasket is in place. Tension on a joint like that can also make them leak.

00 Buckshot · 06-13-2020, 08:17 PM

You may have the inner gasket in upside down as stated above. It will only seal if it is in correctly.

Mogulite · 06-14-2020, 07:48 PM

Thank all! I ended up replacing the p trap.

Domo · 06-16-2020, 08:53 AM

Quote:

Originally Posted by Old Scout

….if you plan to replace it--first challenge will be finding ABS vs PVC pipe....

ABS and PVC both have the same threads. But as you hint, compatibility is always a consideration when replacing anything on a rig.

riverofcode · 06-16-2020, 10:49 AM

I see the OP found a replacement and is dry now but wanted to share my experience.

I replaced 2 bathroom sinks and replaced plumbing under my kitchen sink. I found that all the p-trap threaded ends were "backwards" from residential ones. Meaning the nut was on the opposite side of the fitting than was in my RV. I wound up just cutting the existing stub off and gluewelding a new fitting on the wall stub and converting all of it to residential fittings from a big box hardware store. I just used a glue that was compatible with both ABS and PVC. It makes getting replacement parts much easier in the future.