Toilet Water Running

Old 04-14-07, 12:56 PM
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Toilet Water Running

Whenever I flush my upstairs toilet, as soon as the tank is full, it shuts off and the downstairs toilet start to fill like it's been flushed. Any thoughts?
Old 04-14-07, 05:22 PM
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Just a stab....the house water line pressure drops when the upstairs unit is filling back up, then when it stops, pressure climbs back up, stimulating the other toilet's fill valve to cycle. I would put a pressure gauge on a hose faucet somewhere and watch the pressure as this cycle takes place. The fill would be to replace the fill valve downstairs, preferably with a Fluidmaster 400A

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