1/2 in Bronze Tubular High Capacity Boiler Feed Water Pressure Regulator Replacement for Watts 1156F B1156F S1156F 1/2 in Bronze Tubular High Capacity Boiler Feed Water Pressure Regulator, Replacement for Watts 1156F, B1156F, S1156F 1. WIDE APPLICATION - S1156F Water Pressure Regulator is widely used in commercial and residential hydronic heating systems. Designed to fill water to boilers and pipe systems, to maintain water pressure in the system at all times, and provide makeup water to the system if a leak occurs in the system 2. PROFESSIONAL DESIGN - designed with a bronze body with union threaded inlet and NPT threaded outlet connections, a tight seating check valve, stainless steel strainer, and purge lever for manual purging. Suitable for use in the boiler feed lines of hydronic heating systems 3. DURABLE MATERIAL - our water pressure regulator is made of bronze with corrosion resistant coating, for great strength, wearing resistance, deformation protection. All tools are carefully selected & tested to provide stable performance and high reliability 4. PRODUCT SPECIFICATION - outlet thread type - NPT, outlet connection size - 1/2 IN, outlet connection type - Female Threaded. Inlet connection size - 1/2 IN, inlet connection type - Union Joint 5. ADJUSTABLE PERSSURE SETTING - series 1156 has a high capacity performance and a simplified servicing design, part number 0386450. Adjustable reduced pressure range is 10 to 25 / 0.7 to 1.7 BAR, maximum working pressure is 100 PSI / 6.80 BAR