Watts 174A-075 Bronze Boiler Pressure Relief Valve

Description:

The Watts 174A-075 3/4 (Ordering Code: 0274598) is a bronze boiler pressure relief valve designed to protect hot water heating boilers and domestic hot water supply systems from excessive pressure conditions. Featuring 3/4-inch female NPT inlet and outlet connections, a stainless steel spring, non-metallic disc-to-metal seating, and a test lever, the valve automatically opens when system pressure reaches its set point of 75 PSI and automatically reseats after pressure returns to a safe level. The valve is intended for emergency pressure relief protection and is not designed for use as an operating control.

Applications:

The Watts 174A-075 3/4 Pressure Relief Valve is commonly used in hot water heating boilers, hydronic heating systems, domestic hot water supply boilers, commercial heating equipment, institutional facilities, industrial boiler systems, mechanical rooms, and process heating applications where automatic overpressure protection is required to safeguard boilers, piping systems, and associated equipment from excessive pressure buildup.

Technical Specifications:

• Manufacturer: Watts Water Technologies
• Model: 174A-075 3/4
• Ordering Code: 0274598
• Product Type: Boiler Pressure Relief Valve
• Series: 174A
• Connection Size: 3/4 Inch
• Inlet Connection: Female NPT
• Outlet Connection: Female NPT
• Body Material: Bronze
• Pressure Relief Setting: 75 PSI
• Pressure Range: 30–150 PSI
• Maximum Working Pressure: 56 PSI
• Seat Design: Non-Metallic Disc-to-Metal Seating
• Spring Material: Stainless Steel
• Test Lever: Yes
• Operation: Automatic Reseating
• Function: Boiler Overpressure Protection
• Application Type: Hot Water Heating and Domestic Supply Boilers
• Equipment Category: Pressure Relief Valve

Common Replacements:

• Watts 174A 075 FS 3/4 Pressure Relief Valve
• Watts LF174A-075 3/4 Lead-Free Pressure Relief Valve
• Apollo 10-400 Series Boiler Pressure Relief Valve