ECOPLUS CHECK VALVE 3/16 IN

Water AerationEcoPlus Check Valve is a must have for every air pump. This product helps prevent back siphoning of water which can damage pumps or even flood water into your rooms. This check valve works by allowing air to flow in one direction and blocking water from getting too far down your air tube. Simply connect the Check Valve between the air pump and airstone. Works with 3/16 in ID air tubing.