White PVC Swing Check Valves, Female Threaded Ends (FPT) Adjustable typically in 5-7 business days

typically in 5-7 business days

Snap-on lid for maintenance

3" Drill Backing Dual Sponge Pad (#R72121)

for suction or return

The shelf is elevated 6" above the floor

White PVC Swing Check Valves, Female Threaded Ends (FPT) Adjustable typically in 5-7 business daysCheck valves are essential when using a waterfall filter in conjunction with a pond skimmer. The check valve will prevent water in the filter from back flowing into the skimmer when the pump is switched off and keep water in bogs when the pump is turned off and other purposes. Check valves are also essential when an external pump is being used. The check valve prevents the water from draining back into the pond or reservoir, keeping the external pump