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rgruszecki · 03-26-2016, 10:03 AM

My motorhome with stationary for quite a few years. I got it running again and discovered the black water pipe had a crack on the bottom of the pipe all the way back to the 90° fitting before it goes into the black water tank. Does anybody have any ideas on how I can fix that can I get to the pipe from the bathroom under the toilet or under the sink. I appreciate any ideas or comments.

TQ60 · 03-26-2016, 10:44 AM

How much work do you wish to do?

What level of access do you have?

One option.

First determine the size pipe used and you need to be sure.

Make a trip to the hardware store and check first for your size then get a short piece of the next larger size and see if the circles are close meaning slip it over yours and see if one can be glued to the other.

If so you could take the larger pipe and cut it lengthwise at 9 and 2 looking at the end so it snaps over.

Lots of scrubbing with primer and lots of glue and a few screw clamps and it can be patched this way.

But you need to determine why cracked.

If not cracked into the fitting you can cut and splice or if cracked into the fitting it can be removed and replaced but that requires maybe removing tank.

rgruszecki · 03-26-2016, 07:11 PM

Quote:

Originally Posted by rgruszecki

My motorhome with stationary for quite a few years. I got it running again and discovered the black water pipe had a crack on the bottom of the pipe all the way back to the 90° fitting before it goes into the black water tank. Does anybody have any ideas on how I can fix that can I get to the pipe from the bathroom under the toilet or under the sink. I appreciate any ideas or comments.

chuckftboy · 03-26-2016, 07:35 PM

If you can reach the crack, you could run a bead of 3M 5200 along it. You can purchase 5200 at Home Depot or most any marine supply store. It will stick well on plastic pipe and stays just flexible enough to prevent further cracking.