Metpure Tankless Water Heater Installation Complete Kit TKLS-CK High quality isolation valves by RWV Corp for periodic flushing and descaling of tankless unit Includes other high quality parts: T&P relief valve, gas flex, water lines, brass nipples Works with tankless brands such as Noritz, Navien, Rinnai, Takagi, Bradford, Rheem, and more High quality, lead-free compliant components The only complete kit you'll ever need to complete your tankless water heater installation.