allowing technicians to fine-tune timings for pre-purge

this is the bracket leg itself

Universal Fitting: Features a standard 1/4" hose barb for seamless integration with existing vacuum lines

While primary applications include water and glycol

red oil provides a more distinct meniscus for better legibility and prevents evaporation issues common with water-filled gauges

Resideo T104C1036 Actuator 323055-751 allowing technicians to fine-tune timingsThe Resideo T104C1036 Actuator is a professional grade high capacity thermostatic radiator actuator designed for the precise automation of two pipe steam or hot water systems. This non electric radiator control eliminates the need for external power or wiring, utilizing a robust thermostatic element to modulate flow through radiators, convectors, and baseboard units. Specifically engineered for North American heating applications, the T104C1036