Thank-you. My problem was the valve cartridge. Per Anderson I did change it and bought a backup. Worked great for 6 days. Changed cities and the fresh water again did fill. Final solution is the Shurflo pre filter prior to going into the pump. It was gritty. I put in a new one. Flushed out the pump and it seems to be working. I will keep your solution in mind for future problem.
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