BUILT-IN CHECK VALVE: Each tap has built-in double check valve that prevents backflow of water required by Water Authorities SOLID CONSTRUCTION: The brass tap is made of solid material that gives your tap a long life of use. 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. APPLICATION: For use in gardens, commercial buildings, farms. 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.