Specification Brand : Eco Plus BulletPoint : 1/2 inch compressor tank check valve BulletPoint1 : Ecoplus check valve is a "must have" For every air pump BulletPoint2 : Helps prevent back siphoning of water which can damage pumps or even flood water into your rooms BulletPoint3 : Works by allowing air to flow in one direction and blocking water from getting too far down your air tube BulletPoint4 : Simply connect the check valve between the air pump and Airstone BulletPoint5 : Tested in National Board Approved Quality Assurance Process Color : Silver CompatibleWithVehicleType : Passenger Car ConnectorType : Threaded ExteriorFinish : Aluminum,Copper,Plastic,Steel ExternallyAssignedProductIdentifier1 : 849969013245 ExternallyAssignedProductIdentifier2 : 0849969013245 ExternallyAssignedProductIdentifier3 : 00849969013245 FitType : Vehicle Specific Fit IncludedComponents : EcoPlus Check Valve 3/16 in ItemDisplayDimensions_Length : 11.81 inches ItemDisplayWeight : 1 pounds ItemName : Eco Plus 728400 Check Valve, 3/16" ItemPackageDimensions_Height : 12.8 centimeters ItemPackageDimensions_Length : 0.8 centimeters ItemPackageDimensions_Width : 10.2 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : industrial-check-valves Manufacturer : Eco Plus Material : Brass MaximumOperatingPressure : 400 pounds_per_square_inch ModelName : Check ModelNumber : 728400 NumberOfItems : 1 NumberOfPieces : 1 NumberOfPorts : 2 PartNumber : 728400 ProductDescription : Excellent Features: The bottom valve, also known as the check valve, is a low pressure flat valve . The pump is to ensure that the liquid flows in one direction in the suction line, allowing the pump to work properly. When the pump stops working intermittently, the liquid can not be returned to the water source tank, and the suction pipe is filled with liquid to facilitate the start of the pump. Adopts high quality PVC material which can withstand long time working in water. Professionally and practically designed with good working performance. Alvinlite Specification: Item Type: Pump Foot Valve Material: PVC Color: Black Type: 1.5in 2in 2.5in 3in 4in(Optional)