Black tank dump valve won’t open
I have a new 2021 Thor Compass TW. When I de-winterized coach a couple of weeks ago before trip out west I opened black tank valve to drain anti freeze it opened but was rather hard to pull. Today at the dump station for the first time I tried to open black tank dump valve and it would not open. The handle which I believe has some sort of a cable going to the valve seemed jammed. We just got back from our trip and it’s dark so I plan on checking it out tomorrow. Any ideas on what the problem might be. The tank is about 2/3 full and other than the flushing of anti freeze this would be its 1st dump attempt. Thanks in advance.
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