many technicians pair these with Yellow Jacket 18975 or 19302 compact ball valves

The Resideo TH4110U2005 T4 Programmable Thermostat is a professional-grade

Advanced Diagnostics: Features onboard LED indicators and fault code storage to streamline system recovery after power outages

temperature-actuated mechanical valve that uses internal pressure changes to modulate flow

Trane SWT1615 Rocker Switch 328140-751 many technicians pair these withThe Trane SWT1615 Rocker Switch is a heavy duty DPST (Double Pole Single Throw) control component designed for reliable HVAC circuit switching in demanding commercial and industrial environments. This On Off rocker switch serves as a direct replacement for various Trane and American Standard air handling units and packaged systems where a 4 terminal configuration is required to break both legs of a circuit. Engineered to handle high amperage startup