Every unit includes the high-accuracy A99BB-200C sensor with a 6

Does this switch control the blower motor directly

The 2" stem measurement generally refers to the length from the bottom of the hexagonal nut to the tip of the probe

The rugged construction ensures long-term performance under continuous duty cycles

Look for visible cracking

Watts 0386421 Regulator Valve Els PW 17895 Every unit includes the high-accuracyProfessionals in the field recognize the Watts 0386421 (Model TB1156F) as a high capacity industry standard for hydronic heating systems. This 1 2 inch feed water pressure regulator is engineered to maintain consistent system pressure by automatically filling the boiler and piping. It serves as a drop in 0386500 replacement and is the direct successor to the legacy T1156F valve. Designed for rugged commercial and residential use, the Watts 0386421