909 SE EVERETT MALL WAY CRUCIBLE BREWERY 2025-03-28

4.8 Install Pressure Relief Valve A WARNING Water discharged from the pressure relief valve could cause severe burns instantly or death from scalds. 4.8.1 Guidelines An approved pressure relief valve is required The American National Standard (ANSI by the American National Standard (ANSI Z21.10.3)does not require a combination Z21.10.3)for all water heating systems and shall temperature and pressure relief valve for be accessible for servicing. When connecting a this appliance. However, local codes may pressure relief valve, follow the guidelines below: require a combination temperature and • The pressure relief valve must comply with pressure relief valve. the standard for Relief Valves and Auto- Protect pressure relief valve and pressure matic Gas Shutoff Devices for Hot Water relief valve discharge line from freezing. Supply Systems ANSI Z21.22 and /or the Do not plug or restrict flow of the pressure standard Temperature, Pressure, Tem- relief valve. perature and Pressure Relief Valves and DO NOT plumb the pressure relief valve Vacuum Relief Valves, CAN1-4.4. with the condensate drain; both must be • The pressure relief valve must be rated plumbed independently to drain. up to 150 psi and to at least the maximum DO NOT plug the pressure relief valve and Btu/hr of the appliance. do not install any reducing fittings or other • The discharge from the pressure relief restrictions in the relief line. The pressure valve should be piped to the ground or into relief line should allow for complete drain- a drain system per local codes. age of the valve and the line. • The pressure relief valve must be man- DO NOT place any other valve or shutoff ually operated once a year to check for device between the pressure relief valve correct operation. and the water heater. • The discharge line from the pressure relief valve should pitch downward and termi- nate 6 in. (152 mm) above drains where discharge will be clearly visible. • The discharge end of the line shall be plain (unthreaded) and a minimum of 3/4 in. nominal pipe diameter. The discharge line material must be suitable for water at least 180' Fahrenheit. • The pressure relief valve is assembled to the pressure relief valve adapter as illus- trated on the next page. DO NOT place any other valve or shut off device between the pressure relief valve and the water heater. • If a pressure relief valve discharges peri- odically, this may be due to thermal expan- sion in a closed water supply system. Con- tact the water supplier or local plumbing inspector on how to correct this situation. Do not plug the pressure relief valve. Rinnai Tankless Water Heater Installation and Operation Manual 56