Watts 0121451 Valve Refrigerant the 4290 series is rated

the 4290 series is rated for use with both Liquid Propane and Natural Gas

F up to 220

and function remain the same

ensuring a precise fit that 1-inch retail filters cannot replicate

The inter-stage differential is field-adjustable between 2 and 7 degrees Fahrenheit

Watts 0121451 Valve Refrigerant the 4290 series is ratedThe Watts 0121451 (Model 140S 3 1 150) is a high capacity automatic reseating temperature and pressure relief valve engineered for protection in commercial hot water supply systems. Designed for heavy duty tank tappings, this 1 inch valve features a 3,085,000 BTU hr steam discharge capacity and a standard 150 psi pressure relief setpoint. As a veteran grade commercial T&P relief valve, it utilizes a bronze body and a 3 inch stainless steel thermostat