AA 5/16" Air Pump Check Valve (6/pk)

This specially designed 0.31" (five-sixteenths inch) Active Aqua Check Valve will safeguard your air pump by preventing nutrient solution from back-siphoning and entering it in the event of a power outage. Simply place the check valve in your run of five-sixteenths inch air line tubing between your air pump and reservoir or hydroponic bucket, and you will never worry about solution returning down the air line and damaging your pump.  For pumps that use five-sixteenths inch air tubing Compatible with air pump model AAPA45L Pack of six check valves