Thanks for the help. I found that the ball in the white ball cock valve at the back bottom of the tank had a broken ball. The handle did turn but it did nothing. We had a bad freeze last year and I did not have the rig winterized. I lost the water filter under the kitchen sink (that made a big mess), the shower valve, and the shower sink valve. I had previously replaced them but was not aware of the damage to this valve. All systems are now restored and we are getting ready to try it out again. Its' good to have the motorhome back.
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