Small Leak in Pipe/Black Tank Connection

We had a crack in one of our pipes - I drained the antifreeze/water from it; cleaned the outside of the pipe with alcohol; then wrapped Rescue-Tape around it. It's special tape designed just for that sort of stuff and it's worked perfectly!

Rescue tape

A number of years ago,I ripped off the sewer dump valve when backing into a site.Where the black water pipe entered the black tank. I used JB Weld and it held .We owned the trailer for 4 more years and it never leaked.

We had a leak in the drainpipe of a previous rig. Had a mobile plastic welder fix it. Took about 20 minutes and $125 or so.

Is the valve leaking or where the pipe connects to the tank?

Elizabeth24 wrote:
We have a small leak at the pipe/black tank connections. Has anyone ever had this and what did you do to seal the leak. Was hoping that one could replace a part of the pipe that goes into the tank. Would get a professional out to do this as we cannot move our fifth wheel.Any suggestions?

First check the valve blade assembly. Where the 4 screws are that hold it on. The pipes flex when driving down the road and put pressure on the screw tabs. Hopefully it will be cracked on the side of the replacement blade assembly

Mine looked like it was leaking from the pipe when actually there was a hairline crack around 2 of the screw tabs on the blade assembly. Causing it to look like there had to be a gapping hole leak somewhere when actually it was from a hairline crack. Go figure.

Sadly when we went to remove the valve blade assembly we found the tabs that are connected on the pipe where cracked also.

So bad that when we removed the screw the tab actually broke off. We then had to cut into that pipe.


When RV mobile repair came out they had that rubber sleeve and a piece of pvc and I freaked out! Said NO way are you going to jury rig the repair on my RV!!

Come to find out that "IS" how you repair an inline water pipe. PVC, rubber sleeve, hose clamps.

Call the local RV mobile repair guy at your CG. They see this a lot and have all the parts on board and can fix it in a heartbeat.

Some connection utilizes a rubber type connection with the discharge pipe slipped into. Some are just coated with a grease like lubricant to seal.
Look closely at the connection to see what it is made of.
If this is the case it is fairly easy to take the 3 inch valve apart pull pipe out re-coat then reinstall valve.