While it's a robust cast iron sheave

This Catch-All series component features a 16 cubic inch molded desiccant core with an HH-style charcoal blend

The Johnson Controls P499VAP-101K is a commercial-grade electronic pressure transducer designed for precise HVACR system monitoring

this housing provides the necessary thermal resistance and structural integrity required for high-temperature steam applications

It allows for modular "plug-and-play" swapping of these components

Resideo AP4508 Pressure Switch Els PW 17895 While it's a robust castThe Resideo AP4508 Pressure Switch is an industrial grade differential air pressure switch designed for precision monitoring in HVAC and pneumatic systems. Engineered with a Single Pole Double Throw (SPDT) switch configuration, this component provides versatile control logic for high limit or proof of flow applications. It features a broad operating range from 0. 17" 0. 05" water column to 5" water column, allowing technicians to fine tune setpoints