Newbie! PB waterline leak fix.

Question

I'm a newbie to the whole RV thing. WE have a 94 Cobra Cordoba with a leaking water line. The former owner did a temp fix that didn't hold. The line is gray PB with qest and brass fittings. I want to replace the section of line with PEX and pex fittings. I'm not really sure how to do this and don't know what supplies I need or where to find them.  We also replaced the toilet with a composting toilet so I need to know how to cap off the waterline going to the toilet. I welcome any and all suggestions and comments.  Thank you BooBooandJo.

clouddriver · Answer

Home Depot sells PEX tubing and fittings. When I replaced our RV toilet, I used a push-on Sharkbite valve with the existing PEX tubing to add a shut off.

No idea if these fittings would work in connecting to your existing tubing.

time2roll · Answer

Home Depot/Lowes etc has all you need.  +1 for SharkBite/Gatorbite and pex.  For flexible connections use standard faucet connectors.

azrving · Answer

Hd sells a shark bite adapter to go from apex to Pb. The guy at hd said it won't hold if you use a shark bite on Pb. An RV dealer in the same town said they use shark bite on Pb all the time. I used the adapter.

nancil · Answer

The fittings for PEX are also good for Polybutelyne, copper and CPVC according to the directions on the packages of some new fittings I just bought.Jack L

boobooandjo · Answer

Thank you very much. We've been living in our motorhome for over a month with no running water so the missus and I definately appreciate the help .

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Newbie! PB waterline leak fix.

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