Watts 0121421 Valve Refrigerant The 24-foot bendable 3/8-inch aluminum

The 24-foot bendable 3/8-inch aluminum probe houses four evenly-spaced

This 1/2" NPT gas control valve (thermostat) operates with a 4" WC (Water Column) manifold setting

This genuine OEM part ensures the manifold pressure remains consistent across varying load changes

It serves as a direct drop-in for part PLA021

Watts 0121421 Valve Refrigerant The 24-foot bendable 3/8-inch aluminumThe Watts 0121421, also identified as the LF40XL 8 150, is an automatic temperature and pressure relief valve engineered for high capacity protection of commercial water heaters and storage tanks. This 3 4 inch NPT threaded valve features a reinforced bronze body and an extended thermostat element for accurate thermal sensing. With a dedicated pressure relief setting of 150 PSI and a temperature relief threshold of 210F, it delivers a massive steam