3" Coupling Check Valve Assembly - EP9700 Koi & Goldfish Treatments This Large AquaFalls pad is

This Large AquaFalls pad is shaped like a trapezoid

then lifts and spins it

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

Small Boulder

3" Coupling Check Valve Assembly - EP9700 Koi & Goldfish Treatments This Large AquaFalls pad isThese 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