There is frequently an issue where the in-line check valve is installed backwards, effectively preventing any water from passing through to the tank. The valve tends to be located up underneath the bathroom sink. Look in the bathroom base cabinet and follow the white PEX line from the exterior wall to a black plastic device (the check valve). The valve has an arrow indicating direction of flow and should also rattle if shaken. Verify the ball is free inside and that the direction of flow is correct. Some replace it with a more reliable and well-built version, some cut it out and bypass it and others never use the flush system at all. The choice is yours
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Rob & Amy
2019 Passport 240BH SL (current)
2024 Cougar 29BHL (on order, due early May)
2022 Ford F250 7.3L Godzilla Crew Cab 4x4
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