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These are dedicated gauge ports that allow you to install a pressure gauge on either side of the regulator body
making it compatible with modern HFC refrigerants including R404A
the fail-safe direction (clockwise or counter-clockwise) is determined by the orientation of the actuator on the shaft
this sensor is designed to handle non-corrosive liquids and gases
If the internal alloy has melted to release pressure
Laars Heating Systems R11020104 Draft Diverter Assembly 321142-301 These are dedicated gauge portsThe Laars Heating Systems R11020104 Draft Diverter Assembly is a critical OEM replacement part designed for the Laars Mini Therm JV125 boiler series. This JV125 draft hood is engineered to maintain precise atmospheric venting by neutralizing the effect of chimney downdrafts and regulating the flue gas flow. As a direct replacement for part 11020104, it ensures a seamless fit within the Category I natural draft exhaust system, preventing combustion by