Watts 1" 009M2 Backflow Preventer Reduced Pressure Zone Assembly RPZ 1 009M2-QT 0063020 63020 Single access cover and modular check construction for ease of maintenance. No special tools required for servicing. Ball valve test cocks. Quarter-turn, full port, resilient seated, bronze ball valve shut-offs and renewable seats. Does not conform to Lead Free act. For non-potable use only (irrigation, fire sprinklers, etc).