Watts 3/4 374A 030 Fs Boiler Relief Valve 30 Psi

Product Description

The WATTS 3/4 374A 030 FS is a boiler pressure relief valve designed for hot water space heating systems. It opens at a 30 psi setpoint to discharge excess pressure before it can damage the boiler or connected piping. The valve features an iron body with a forged bronze inlet and non-metallic disc-to-metal seating for reliable, long-term performance. A built-in test lever allows technicians to verify valve function without removing it from service. This unit also includes a nonrestrictive discharge drain line flood sensor with SentryPlus Alert technology that detects excessive water discharges, providing an early warning of chronic overpressure events.

This relief valve is suited for residential and light commercial hot water space heating boiler applications where pressure protection is required. The flood sensor can be connected to existing building management systems or to the Watts Cellular Gateway using accessory kit 88009464, which must be purchased separately to activate the sensor function. Licensed plumbers and heating contractors install this valve as part of standard boiler safety compliance, typically near the boiler pressure vessel outlet.

Key Features

• 30 psi pressure relief setpoint protects boilers and hydronic systems from overpressure
• 3/4 inch NPTF female inlet and 3/4 inch NPTF female outlet for standard pipe connections
• Iron body with forged bronze inlet for durable construction in wet heating environments
• Non-metallic disc-to-metal seating for consistent, leak-free shutoff after discharge
• Manual test lever for in-place functional verification
• Integrated SentryPlus Alert flood sensor detects excessive discharge events and supports BMS or cellular gateway integration

Compatibility

Designed as an OEM-style replacement or new-installation relief valve for residential and light commercial hot water space heating boilers requiring 3/4 inch NPTF connections and a 30 psi setpoint. Sensor activation requires Watts accessory kit 88009464, sold separately, compatible with existing building management systems or the Watts Cellular Gateway.

Installation Notes

This valve must be installed by a licensed plumber or heating contractor in accordance with applicable local plumbing and mechanical codes. Always shut down and depressurize the boiler system before removing or installing a relief valve. Connect a full-size, code-compliant discharge line to the outlet that terminates safely per local code requirements. Do not cap, plug, or restrict the discharge outlet at any time.

Technical Specifications

• Pressure Relief Setpoint: 30 psi
• Inlet Connection: 3/4 inch NPTF female
• Outlet Connection: 3/4 inch NPTF female
• Body Material: Iron with forged bronze inlet
• Seating Type: Non-metallic disc-to-metal
• Weight: 6 pounds
• Unit of Measure: EA
• Package Quantity: 6

Standard Information

• Brand: WATTS
• Manufacturer Part Number: 3/4 374A 030 FS