FINALLY got around to de-winterizing the Sunseeker today. I've been working on several other projects around the house since God knows when and since we're going out on the 24th, I figured I HAD to do some work on Sunny.
I don't have exactly the same problem, but enough of a problem. My city connection just leaks - water doesn't shoot out. So, I jumped on to ask a question and wouldn't you know it? The answer is already here!
Thanks everyone for your input. This will be the first thing I check.