Surgery on the TT's throne.

Atlee wrote:
I suppose it's possible it froze but I don't think so. As far as I know, it never got below 32 in side. We kept a heater hooked up all winter, and this winter wasn't as bad as last winter. I know the natural gas usage this year is way down from the same period last winter.

What I found interesting was no O ring was to be found on the water valve I removed. There should have been one, and I would think there was one, but I didn't see it upon removal of the module.

The new module had a red O ring.

DavidP wrote:
The typical failure of the vacuum breaker is a small amount of water seeping past the o rings in the valve and making it past the vacuum inlet. This results is a little water making it to the floor after filling the bowl and not so much from a quick flush. The fact yours sprayed water once put back in operation is most likely from freezing and cracking.

I did have to replace mine twice but the last one has been in there several years. In talking with Thetford several years ago when replacing for the second time I was told a change was made to address the problem. Since then it has been fine. Either way this does not seem to be what your problem was. Pink stuff is your friend.

You have to take apart the valve to get access to the O-rings that seal water from entering the vacuum breaker assembly. This is the round part with a hole that sits in the upright position once installed. Many folks have replaced the O-rings instead of replacing the entire valve. As I’m sure you are aware the red O-ring you referred to is for the flush/fill hose for the bowl.