[lightning79]

I"d say that Festus has hit the nail on the head regarding my issue, I know I didn't have any antifreeze in their over the winter. I've searched these forums and found a few things, but I"m having a hard time figuring out what the check valve and the vaccum breaker valves look like.

Well, I don't use the toilet very often, and have ever only used it for one thing and not the other, so it sounds like I don't need to be in a rush to get this fixed.

Silly me, so this is a result of not fully winterizing the trailer, and I was sure I followed the winterizing guide the dealer gave me!

Thanks for all the responses!

Kevin