and the system charge should be recovery-tested

maintaining reliable automatic reseating after a pressure event

Contractor-Grade Durability: Features 28VA pilot duty at 24VAC and robust pressure-sensitive diaphragms built for long-term cycling in high-demand zoned systems

Standardized Fit: Round 11970 form factor ensures compatibility with most existing terminal connections and mounting hardware

Yellow Jacket 77940 Oil Pump Els PW 17895 and the system charge shouldThe Yellow Jacket 77940 is a heavy duty Max Flow oil pump engineered for the rigors of professional field service. Designed as a high performance HVAC oil transfer pump, this tool enables technicians to perform compressor oil charging or removal with precision. It delivers a high displacement of 2. 6 oz. per stroke and is rated to overcome system pressures up to 250 PSI, allowing for oil additions while the equipment remains operational. This