I checked the air pressure on the top of my tank and water squirted out. When there is a high demand for water the pump (submersible) clicks on and off rapidly then stops (with no pressure at the tank) for 20 sec or so before coming back on.
When the pump stops the contact-ors in the switch are touching. It will do this until the demand is gone. I can turn a tap on or have a shower OK , but when the tap/shower is on and someone flushes a toilet it happens. Any help would be appreciated