Re: Tank will not refill normally
This from the Fluidmaster web site-
3. Why won't my 400A Fill Valve turn on?
Problem: Cap on top of the valve is not properly locked into place.
Solution: Shut off water supply. Lift arm, then remove valve top by rotating 1/8 turn counterclockwise. Refit top by lifting arm, replacing top and rotating clockwise until locked. Valve won't turn on if top is not fully engaged in the locked position.
Another possibility is a floating washer or debris in the shut off valve.
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