1pcs 1/2" Ball Check Valve Inner diameter 20mm Non-Return Thickened PVC Pipe Fittings

"I know why you came, my friendColor: GRAYMaterial: PVCPackage: 1Pcs x PVC Check Valvesize：1/2 -20mmProduct FeaturesThe check valve are made of PVC material, durable and compact, it can prolong the product service life.Safe and nontoxic.Strong resistance to acid, alkali corrosion ability, can be used for different types of liquid.Non return check: it would allow from one side to another and stop the other way round. Widely used in backflow of water supply pipe, backflow of water tank pump pipe and backflow of sewage.