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22 and NSF 61G ensures this component meets the stringent standards for both pressurized mechanical systems and potable water applications
What is the purpose of the 27" capillary
For gravity-fed or zero-pressure systems
The A-4000-612 cartridge is typically housed in units featuring a 3/4 inch NPT connection
This HVAC temperature sensor is functionally identical to the Lennox 37K6301
McDonnell & Miller AF-2 Switch Freon 22 and NSF 61G ensuresThe McDonnell & Miller AF 2 Air Flow Switch (Part Number 123200) is a specialized low velocity air flow switch engineered to prove fan operation and monitor airflow in critical HVACR systems. Built for durability, this field proven unit features brass, steel, and aluminum construction, making it ideal for standard commercial and industrial duct environments. The integrated snap acting SPDT switch provides reliable signaling for interlocking blowers,