Lead-free series TWH (tankless water heater) valves are designed to simplify the installation, maintenance, and operation of tankless water heaters. Features: 3/4" FPT (female pipe thread) unions for connection to water lines. Full-port, quarter-turn ball valve with color-coded tee handle and union. Quarter-turn purge and drain valve with hose connection and tethered brass cap. Hot and cold valves certified to NSF/ANSI 61 (National Sanitation Foundation/American National Standards Institute Act 61). Staggered connection points for ease of installation and access. Valves are suitable for most tankless installations. No additional adapters required and rated to 600 WOG (water, oil, and gas pounds per sq in). The wetted surface of the product contacted by consumable water contains less than 0.25% weighted average lead content on wetted surfaces. Meets AB1953 (California) and VT S152 (Vermont) low lead restrictions.