Watts F383742 740-1 1/2-45 Temperature & Pressure Relief Valve

Description

Watts 740 Series Temperature & Pressure Relief Valve

The Watts F383742 (Model 740-1 1/2-45) is a full-size, factory-set temperature and pressure relief valve engineered to provide dependable overpressure and overtemperature protection for boilers and hydronic heating systems. Part of the trusted Watts 740 Series, this valve is a go-to solution for HVAC and plumbing professionals who demand code-compliant, long-lasting safety performance.

Key Features

• 1-1/2″ pipe connection for high-capacity boiler and hydronic applications
• Factory-set at 45 PSI for consistent, reliable pressure relief
• 3,903,000 BTU/hr rated capacity for large commercial and industrial heating systems
• Full-size (FS) construction for maximum flow and minimal pressure drop
• Watts 740 Series design — a proven standard in temperature and pressure relief
• Factory-set relief point eliminates field adjustment and ensures code compliance
• Durable construction suitable for demanding hydronic and steam boiler environments

Typical Applications

• Commercial and industrial boiler systems
• Hydronic heating systems requiring T&P overpressure protection
• Hot water heating equipment requiring ASME/ANSI-compliant safety relief
• Large-capacity heating plants and mechanical rooms

Why Choose the Watts 740 Series?

Watts has long been a trusted name in flow control and safety products. The 740 Series relief valves are designed to open quickly and reseat reliably, protecting your system from dangerous pressure and temperature excursions. The factory-set configuration ensures the valve performs exactly as specified right out of the box — no guesswork, no field calibration required.