Faucet drain pipe leaking between P trap and stub out

Users who are viewing this thread

Loneriver

New Member
Messages
14
Reaction score
0
Points
1
Location
Florida
Hi all,

I installed a new vanity in the bathroom and am replacing the p trap to the new sink. I might be using the wrong terms so please bear with me. The current setup is a stub out made of metal. Attached to that is a black PVC trap arm. The part that angles down to the p trap is flared. This flared end connects connects to the p trap. I assume this is just the common setup.

I was not able to unscrew the black nut from the metal stub out. It wouldn't budge so I just decided to keep the black PVC trap arm on and reuse it.

My new p trap assembly is the thin-walled white PVC style. I hooked that up last night (flared part of the black arm seemed to fit right into the receiving end of the new white p trap. The existing black nut screws easily onto the new white p trap. All seemed to fit well.

This morning I checked and see water had dripped from that joint between the existing black arm and the new white p trap.

Question 1: Is there an issue where the existing black flared end doesn't mate properly with the new white p trap?
Question 2: If that black/white joint shouldn't be made for some reason then I would have to remove the existing stuck black arm and replace it with the white arm the p trap kit came with. How do I get the black arm off? Is it maybe glued on with some type of pipe thread sealer that I have to overcome by force? If not, should I just cut through the black PVC nut to remove it?

Picture of existing setup is attached. I didn't take a picture of the new setup but hopefully my words were clear enough. Thank you all for your help!

-Rob
 

Attachments

  • existing bathroom faucet stub.jpg
    existing bathroom faucet stub.jpg
    69.4 KB · Views: 961

Terry

The Plumbing Wizard
Staff member
Messages
29,942
Reaction score
3,468
Points
113
Location
Bothell, Washington
Website
terrylove.com
I don't mix p-trap parts for just that reason. I prefer to replace entirely. It may be that you will need to pick up a rubber slip joint washer where it meets the wall stubout. Plastic doesn't seal as well there.

p-trap_with_adapter.jpg
 

Loneriver

New Member
Messages
14
Reaction score
0
Points
1
Location
Florida
Thank you for the quick reply, Terry.

I don't quite understand the recommendation. I've attached a hand sketch to try to be more clear. The leak is not at the wall stubout. It is between the existing horizontal arm (black) and the new p trap (white). Are you suggesting adding a rubber slip joint washer at that transition? If so, I would have to cut off the existing black flare from the end of the arm?

You also said you prefer to replace it all entirely. That is what I'd like to do as well but as I mentioned above, I can't seem to get the black nut to turn where it meets the metal stubout. I'm scared to force it but if that's all I need to do then I will to to remove it. How would you remove it if stuck on the metal stubout? Wrench with force? Just cut it off?

Thanks again for your help. Your site has helped me for many years now!

-Rob
 

Attachments

  • drain leak2.jpg
    drain leak2.jpg
    75.1 KB · Views: 2,254

Terry

The Plumbing Wizard
Staff member
Messages
29,942
Reaction score
3,468
Points
113
Location
Bothell, Washington
Website
terrylove.com
The black nut at the galvanized should be removable, and if not, it can be cut off.
Maybe some heat from a hair dryer would help to loosen it.
 

Loneriver

New Member
Messages
14
Reaction score
0
Points
1
Location
Florida
Thanks again. I will attempt to remove/cut off the black nut from the galvanized pipe tonight. Can I just screw the new white pvc nut directly on to the galvanized pipe? On some sites I see people screw some type of brass connector (trap adapter?) onto the galvanized which gives new "better" threads for the white pvc nut to attach to? Do both ways work? Thanks again.
 
Top
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks