Cornerstone water leak

[Tom Hill]

I had the same problem with my new Cornerstone. It leaked where every faucet supply in both baths and the kitchen were attached to the pex tubing. I figured out that the brass adapters that went from the 1/2 pex couplings to the 3/8 supplies were not long enough to compress the cone washers in the 1/2 in fittings. I couldn't find longer adapters so I cut the 1/2 inch pex ends off and installed 1/2 by 3/8 shark bite stops. Lowes and home depot have them. Now I have no leaks and as a bonus, I can isolate the sink faucets should I ever need to. You will have to pull up the bottom shelf in the cabinets in the baths. Grab a square head screwdriver. Its not that hard, just tight. The shark bites just push on the pex.

[22callaway22]

Our actual leak wasn't from the Santee flush fitting it was from the swing elbows. Did receive a part reply regarding shark fittings went to Home Depot started the same repairs and replacements of all of the black swing elbow fittings. It makes for a permanent fix. However coaches under warranty little frustrating I'm doing all the work for now ??

[22callaway22]

Thanks for the reply Tom,
bought the same shirt fittings get the problem solved. Just a bit of work.

[Mr_D]

Originally Posted by wrenchead

I believe the anti-siphon needs to be above the level of the black tank to keep it from allowing the tank to back flow. this way it opens to allow air only when the pressure is removed and the piping drains creating a siphon effect. I only suggested relieving pressure through the check to see if the leaking stopped. Replacing the valve is the best cure, as recommended by CS.

Correct.
We've had that some type anti-siphon valve in the black tanks rinse in both our 2000 and 2002 DSDP. Had one go bad in the 2000, replaced under warranty. In the 2002 I took it apart, cleaned and lubed it and ti was still working years later. They do go bad, especially the plastic ones.