MY PUMP MAKES A LOUD NOISE EVERY TIME IT STOPS. WHATS WRONG?
The noise you hear is the check valve closing. When the flow reverses in the discharge pipe after the pump stops, this slamming effect (Water Hammer) occurs. • MY PUMP IS HUMMING BUT NOTHING IS BEING PUMPED. WHAT’S WRONG? The pump is probably air locked. If you have a check valve in the system make sure your 3/16″ vent hole has been drilled and it is not clogged. If it has not been drilled, disconnect the pump from your power source and drill the hole (See questions #1&4). If the vent hole solution is not the problem, remove the pump from the pit after disconnecting the power and piping and make sure the impeller rotation is not being restricted. • I HAVE TO SHAKE THE DISCHARGE PIPE TO GET IT TO RUN. WHAT’S WRONG? If you have an automatic unit with an integral float switch, the switch assembly is malfunctioning and the switch, switch arm, and case gasket should be replaced. The average switch life is 4-7 years but may be higher or lower depending on the application. If you have a nonau
