Bestway Check Valve / Non-Return Failure

Water backflows or drains unexpectedly when pump is off

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Faulty internal check valve, Incorrect hose routing, Siphoning effect due to elevation differences, Debris preventing valve closure

Safety first: Disconnect power before adjusting hoses or valves.

Check hose routing: Ensure hoses are installed according to the Bestway manual and not routed in a way that promotes siphoning.
Raise hose loops: Create high loops in hoses above water level to reduce siphon risk.
Inspect for debris: Clean suction and return fittings to prevent debris from holding valves open.

If backflow continues, an internal check valve may be defective and require replacement of the affected valve or pump assembly by a technician.

Medium 3/5

Internal Check Valve

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