Evolution Aqua Dual Union Ball Valves, Slip Connections A&L Furniture This black rubber sealant is

This black rubber sealant is recommended for sealing pond liner to skimmers and waterfall boxes

Includes 5" radial air diffuser

and reduce the head to allow for lower restriction and higher flow rates

L-Ascorbyl-2-Polyphosphate (source of Vitamin C)

Evolution Aqua Dual Union Ball Valves, Slip Connections A&L Furniture This black rubber sealant isBall valves are helpful when trying to regulate pump flow or temporarily restrict flow to work on a pump or filter. They allow you to stop back flow completely while disengaging your pump, or to throttle your flow rate down, or direct water through specific lines. Always restrict the flow at the line discharge and never directly at the pump or on the intake side.