Watts F121451 140S-3-1 1″ T&P Relief Valve 150 PSI 3,085,000 BTU

Description

Watts F121451 — Model 140S-3-1 Temperature & Pressure Relief Valve

The Watts F121451 is a heavy-duty temperature and pressure (T&P) relief valve engineered for commercial and industrial hydronic heating and boiler applications. Designed under Watts’ trusted 140S series, this valve provides critical overpressure and overtemperature protection, automatically discharging excess pressure or heat before dangerous conditions can develop.

Key Features

• Model: 140S-3-1
• 1″ inlet/outlet connection for straightforward installation on commercial boilers and water heaters
• 150 PSI pressure relief setting for high-capacity system protection
• 3,085,000 BTU/hr rated discharge capacity — suitable for large commercial heating systems
• Automatic operation: opens to relieve excess temperature or pressure, reseats when conditions normalize
• Durable construction built to withstand demanding hydronic and steam system environments
• Designed to meet industry safety standards for boiler and pressure vessel protection

Application

The Watts 140S-3-1 T&P relief valve is ideal for protecting commercial boilers, large water heaters, and hydronic heating systems. Its 3,085,000 BTU/hr capacity and 150 PSI rating make it well-suited for high-output heating equipment where reliable overpressure protection is essential.

Why Choose Watts T&P Relief Valves

Watts is a globally recognized leader in flow control and water quality products. The 140S series T&P relief valves are engineered for long service life, accurate set-point performance, and code-compliant safety in commercial HVAC and plumbing systems.