BUILT-IN CHECK VALVE: Each tap has built-in double check valve that prevents back flow of water required by Water Authorities ANTI RUST CAP: The tap with butterfly handle or lever type handle comes with anti rust cap that secure a handle to tap body preventing it from rusting. PSW COMPRESSION NUT: The perfect fixture of nut makes it easy to set the tap in right position.The addition of PTFE o-ring makes this tap leak proof and no additional PTFE tape is required WALLPLATE FLANGE: This wall plate adapter replace standard wall plate and copper tail/pipe APPLICATION: For use in gardens, commercial buildings, farms