My stack is leaking where it connect to the drain in basement floor.

PVC, ABS, cast Iron, at a joint? Hole? How about a pic so we can see what you have and maybe we can help. Little too vague.

It's a Pvc stack that attaches to pipe in basement floor. It has started leaking at the seam where the pvc connects to pipe in floor. Out how.

The floor pipe is also PVC? Anything backing up or just a drain leak? If the leak is at a PVC/PVC joint, make sure the joint is dry and heat it a bit with a hair dryer. Then get some PVC glue and slowly build some layers around the joint. There should be no pressure on the fitting so it should seal. The best possible solution would be to remove a section of the pipe, take out the pipe insert and re-glue a section but believe me, try the first solution. If you can sand the fitting a bit you could also try some epoxy but the glue should do well. .

Wah-kon-tah should really know the answer to the problem so I'm going to guess that you are NOT the omnific presence and are seeking our help on the matter, huh? :)

Hey, I'm going to guess that the PVC goes into a black cast iron pipe/hub and that there is a lead ring between the PVC and the cast iron hub. If this guess is correct then you may be able to purchase a leading tool and reset the lead ring that is leaking... see image of caulking irons below.

Look at the PVC pipe as it enters the pipe... use a screwdriver and push down on the "ring" surrounding the pipe... is it malleable? If so, then you may be able to rest as mentioned.

Also, tell us if this is a new "leak" or could it be an oily residue/buildup?

Back to you...

Mark

Wah-kon-tah should really know the answer to the problem so I'm going to guess that you are NOT the omnific presence and are seeking our help on the matter, huh?? :)

Hey, I'm going to guess that the PVC goes into a black cast iron pipe/hub and that there is a lead ring between the PVC and the cast iron hub. If this guess is correct then you may be able to purchase a leading tool and reset the lead ring that is leaking...see image of caulking irons below.

Look at the PVC pipe as it enters the pipe...use a screwdriver and push down on the "ring" surrounding the pipe...is it malleable? If so, then you may be able to rest as mentioned.

Also, tell us if this is a new "leak" or could it be an oily residue/buildup?

Back to you...

MarkThis is a new leak it started a few days agoand yes it goes into a cast iron pipe.

If possible, a picture up closer to the junction between the cast iron and PVC would be helpful... hard to tell what that is in between there?

In terms of the leak, to determine if it is related to the PVC, start by wrapping toilet paper around the PVC fitting base... see if it gets wet. If it doesn't get wet then the issue is at the cast iron or the seal in between.

Post another pic. if possible!

Thanks!

Please, tell us: is it leaking where PVC connects to Cast Iron - or is the leak coming from Cast Iron where pipe meets concrete ?

Back to you / Milo

Well after wiping down the stacks I found the leak coming from the bottom of the toilet tank. Relaced that and the leak has stopped thanks for all your help guys..

Ahhhh... another sneaky leaker! I am glad you found it WITHOUT first tearing the floor up! Thanks for the update!