White PVC Swing Check Valves, Slip Ends (SLIP) Size:4" Slip Then just open the shut-off

Then just open the shut-off valve to back flush the Savio pond filter

8000 grit (#R72080)

the Ultima II patented cyclonic backwash separates the waste and flushes it out the waste line for easy cleaning

NOTE:  If replacing the 2" Spider Gasket the old gasket must be completely removed though it was originally glued in place and the new spider gasket must be glued in place using a fast drying Rubber Gasket Adhesive

White PVC Swing Check Valves, Slip Ends (SLIP) Size:4" Slip Then just open the shut-offCheck 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