and 51 boiler controls

making this tubing compatible with most 3/8" pneumatic barbed fittings and compression connectors

it features a high-impact ABS plastic housing designed to protect the internal drive mechanism from dust and standard environmental stress

preventing common field issues such as delayed ignition

this tee features 3/8" SAE flare connections on the run and a 3/8" MPT (Male Pipe Thread) center branch

Carrier HK02ZB421 Pressure Switch 320788-702 and 51 boiler controlsThe Carrier HK02ZB421 Pressure Switch is a critical safety component designed for R 410A refrigerant residential and commercial air conditioning systems. This heavy duty high pressure switch features a normally closed SPST (Single Pole Single Throw) configuration and is factory calibrated to open at 610 PSI to prevent compressor damage during over pressurization. Once system pressure stabilizes, the switch initiates a manual reset or automatic close