WATTS 1-1/4"-740-075 WATER PRESSURE SAFETY RELIEF VALVE 740-075 740075

Description:

The Watts 740-075 Water Pressure Safety Relief Valve is a 1-1/4 inch pressure-only relief valve used in hot water space heating boiler systems to protect equipment from excessive pressure conditions. Commonly installed in commercial boilers, hydronic heating systems, mechanical rooms, district heating equipment, industrial process heating systems, and institutional boiler plants. Maintenance personnel, boiler contractors, OEMs, and facility operators use this valve for safety compliance, preventive maintenance, system upgrades, and replacement of existing boiler pressure relief devices.

Applications:

The Watts 740-075 is commonly used in commercial and industrial hot water boiler systems, hydronic heating networks, central heating plants, educational facilities, hospitals, government buildings, manufacturing facilities, apartment complexes, hotels, mechanical equipment rooms, district energy systems, and process heating applications. The valve provides automatic overpressure protection for boilers and associated heating equipment by relieving excess system pressure before damage can occur. It is designed for hot water space-heating applications where ASME-compliant pressure relief protection is required to safeguard boilers, piping, heat exchangers, pumps, and related heating infrastructure.

Technical Specifications:

• Manufacturer Part Number (MPN): 740-075 / 740075
• Brand: Watts
• Product Type: Water Pressure Safety Relief Valve
• Series: 740
• Valve Size: 1-1/4 in.
• Inlet Connection Size: 1-1/4 in. Female NPT
• Outlet Connection Size: 1-1/2 in. Female NPT
• Body Material: Iron
• Pressure Relief Setting: 75 PSI
• Pressure Range: 30–75 PSI
• Operation: Spring Loaded
• Reseating Type: Automatic Reseating
• Seat Design: Non-Metallic Disc-to-Metal Seating
• Spring Material: Stainless Steel
• Test Lever: Included
• Application: Hot Water Space Heating Boilers
• Feature: Expanded Outlet Design
• Service: Boiler Overpressure Protection
• Maximum Working Pressure: 56 PSI
• Installation: Inline Boiler Safety Relief Service

Common Replacements:

• Watts 740 075 FS 1-1/4 (F383484)
• Watts 374A Boiler Pressure Relief Valve
• Watts 335 Boiler Pressure Relief Valve