White PVC Swing Check Valves, Slip Ends (SLIP) Size:3" Slip To protect fish and invertebrates

To protect fish and invertebrates during shipping

50W 180 White

1" Thick Top

This low maintenance solution saves you time and trouble

White PVC Swing Check Valves, Slip Ends (SLIP) Size:3" Slip To protect fish and invertebratesCheck 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