Key Benefits for Technicians: Universal Mounting: Compact design with a heavy-duty steel frame allows for easy installation in various orientations within tight mechanical cabinets

making it suitable for chilled water

or equipment damage

preventing the fouling typical in standard configurations

this cast iron check valve allows for internal component maintenance without breaking brazed joints

Lennox 73K21 Limit Switch 320735-701 Key Benefits for Technicians: UniversalThe Lennox 73K21 Limit Switch is a critical safety component designed for precise thermal regulation within residential gas furnaces and air handlers. Engineered as a Lennox replacement part, this 145 175F AUTO limit switch monitors discharge air temperatures to prevent heat exchanger overheating. It operates on a normally closed circuit that opens if temperatures exceed the 175F threshold, effectively cutting power to the gas valve or ignition