3" Coupling Check Valve Assembly - EP9700 Koi & Goldfish Treatments This product contains 3

This product contains 3

EBD4A incorporates an air diffuser into the dome lid - incoming air is delivered up through the center stand pipe allowing air tubing to be installed under liner

Polyethylene underlay keep diffusers from settling into the muck and prevents sediment erosion during operation

then lifts and spins it

These units are designed to easily connect a pump that is in a skimmer or vault to a flexible or rigid PVC waterline

3" Coupling Check Valve Assembly - EP9700 Koi & Goldfish Treatments This product contains 3These units are designed to easily connect a pump that is in a skimmer or vault to a flexible or rigid PVC waterline. The check valve is important for stopping a backflow of water in the event of a power loss. Each unit has a heavy duty PVC Check Valve with a MNPT fitting that screws into the pump on one end, and a rubber coupling to connect to the water line on the other end. The table below shows which Check Valve Assemblies are compatible with