1 1/2" Coupling Check Valve Assembly - TH150, TH250, TH400, TH750 AquaFalls Waterfall BioFilters Multiply by 60 for GPH:

Multiply by 60 for GPH:

vases or rocks where splashing is minimal

See label about pH requirements before application

change the external air filter(s) at least once every 6 months of operation

1 1/2" Coupling Check Valve Assembly - TH150, TH250, TH400, TH750 AquaFalls Waterfall BioFilters Multiply by 60 for GPH:These 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