40L315034 T&P 1437600 For Watts Part# 121406

The Watts 0121406 40L-3-150, 3/4 Inch T&P 1,437,600 is a temperature and pressure relief (T&P) valve used in a variety of HVAC (heating, ventilation, and air conditioning) applications. It protects the system from high pressure and temperature by automatically releasing excess pressure or hot water when they exceed the preset limits. This safety feature helps to prevent pipe bursts, equipment damage, and possible injuries. The 3/4 inch represents the pipe size that the valve is compatible with, and 1,437,600 is most likely the pressure relief rating in pounds per square inch (psi). It serves as a safety mechanism, automatically releasing excess pressure or hot water when they exceed predetermined limits. This helps to avoid pipe bursts, equipment damage, and potential injuries.