White PVC Swing Check Valves, Slip Ends (SLIP) Size:3" Slip ethylene (dimethylimino)

ethylene (dimethylimino)

ALSO consider adding Automatic cleaning cycles to the Nexus220 or Nexus 320 with this link

75SLDGDRVAL Sludge Drain Valve

The bacteria help establish and maintain a clean pond

Covington Style - Diagonal lattice

White PVC Swing Check Valves, Slip Ends (SLIP) Size:3" Slip ethylene (dimethylimino)Check 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