The Sensus 143-16-021-04 Blue Spring is a critical calibration component engineered specifically for Sensus 243-12 and 121-12 gas pressure regulators

checking for a faulty furnace flame sensor is your first move

This limit thermostat provides the rugged reliability needed in heavy-duty commercial environments

Broad Boiler Compatibility: Engineered specifically for Lochinvar and A

providing precise PPM moisture detection for various refrigerants

Watts 0121421 Valve THPU32HP7Y The Sensus 143-16-021-04 Blue SpringThe 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