... refined copper, Forming the main body, Watertight protection. Copper one way valve one way valveAngle valve material:This section the finest refined copper, forming ... Angle of use:Triangle valve use - protect your faucet and hose, water control switch, decompression, a leading on to two ... easily control the water pressure, and also to protect Hose of your faucet.2, when maintenance show their skills. ...