Slow leak in kitchen drain pipe

[pedz55]

Hi, we have a slight drip in the plumbing under our kitchen sink that I was about to try and fix (I'm reasonably handy but not a ton of experience with plumbing). The leak is a slow drip from under the clear connector in the picture (only when water is running).

At first I was worried there is no p-trap, but I checked in the basement and it is down there, so that is not an issue.
Any suggestions on the easiest way to fix a slow leak on the clear connector circled below? Adding some thread tape or something else? This is assuming I don't see any structural issues with it.

Appreciate any help you can provide, worried this is going to become a much bigger project than originally expected.



Thanks,
Peter

 

[Jeff H Young]

change nut those nuts often have a built in washer that seals the connection or use a nut with seperate beveled washer

 

[Sponsor]

 

[pedz55]

change nut those nuts often have a built in washer that seals the connection or use a nut with seperate beveled washer

Thanks for the reply, appreciate it!

I took it apart and that nut has no washer in it. Assume that is a problem and should buy one with a washer?
Also, that connecting pipe is in bad shape and has pin holes in it (see light coming through in the pic), which I assume, along with the lack of a washer, is the cause of the leak (otherwise given this pipe goes well into the pipe below it I couldn't see how water was getting out to the nut).

Thanks,
Peter

 

[Reach4]

Your installation is not compatible with IPC, because you don't have a vented trap there. The vent could be with an AAV. Have you picked up sewer smells near the kitchen sink drain?

In Canada, I think you could have a vented trap below the floor. But we don't know if there is a trap at all.

If I did not worry about a trap, and just wanted to fix a leak, I would still consider replacing that brass slip joint 45 with a plastic one. Plastic does not corrode. And still replace that nut on the PVC with one that has a separate 1-1/2 inch slip-joint washer.

 

[pedz55]

Your installation is not compatible with IPC, because you don't have a vented trap there. The vent could be with an AAV. Have you picked up sewer smells near the kitchen sink drain?

In Canada, I think you could have a vented trap below the floor. But we don't know if there is a trap at all.

If I did not worry about a trap, and just wanted to fix a leak, I would still consider replacing that brass slip joint 45 with a plastic one. Plastic does not corrode. And still replace that nut on the PVC with one that has a separate 1-1/2 inch slip-joint washer.

Thanks, I checked the basement and confirmed there is a p trap down there. And since I found pin holes in the 45 degree metal pipe I’m replacing it with PVC as you suggested.

 

[Reach4]

A good way to get what you need it to get a "double offset" slip joint fitting. Then cut to the length that you want.
https://www.acehardware.com/departments/plumbing/pipe-fittings/plastic-fittings/4594610

 

[pedz55]

A good way to get what you need it to get a "double offset" slip joint fitting. Then cut to the length that you want.
https://www.acehardware.com/departments/plumbing/pipe-fittings/plastic-fittings/4594610

Thank you! Was having a hard time finding a replacement, that looks like it will work.