The body is made from high quality brass bronze with a mixture of 85% copper. The cover and valve valve. Produced using the hot forging method, equivalent to products from Japan. All components are made from high quality bronze.To prevent steel from rusting throughout the life of the swing check valve. is a blocking type valve Water can only flow in one way. The function of this type of valve will be automatic That is, water can flow through the valve in the direction where water flows in But if there is pressure of water flowing back, the valve inside will immediately block it. Every piece of swing check valve has passed Test for leaks and water pressure. for the confidence of users