3" Coupling Check Valve Assembly - All TM, TB, pumps Bulkhead Fittings Lava Rock tends to shred

Lava Rock tends to shred media bags

2600 w/o fish No 1"

All rocks come standard with one screened vent

Made of recycled material

3" Coupling Check Valve Assembly - All TM, TB, pumps Bulkhead Fittings Lava Rock tends to shredThese 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