You can replace the checkvalve, just be sure to pick out the appropriate valve for your aquascape pump. Is the pump not working at all but you hear a hum? Click here to purchase a new aquascape pump checkvalve to replace the broken checkvalve. It simply means that air is trapped in the volute of the pump. This happens sometimes when the electric goes off and shuts down the pump. The pumps are designed to push water, not air…so an air bubble gets trapped and the pump becomes vapor locked. ![]() In this situation the impeller is basically spinning, but water is not being pushed. Listen to see if you hear the hum of the pump. A vapor lock can be fixed by tilting the pump to allow the air to escape from the intake. You may even be able to accomplish this without disconnecting the fitting on the end of the check valve. Make sure the safety breaker on the ground fault circuit interrupter has not tripped. GFCIs are very sensitive and can sometimes trip during a thunderstorm or a power surge. ![]() Reset the breaker if it has tripped and check the line with a hair dryer to make sure it is working. Try unplugging your pump and disconnecting the union fitting found at the top of the check valve.
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