The BASO Q90BB-1 Pilot Burner & Sensor

This specific replacement gas valve has the 1/4" pilot tap located on the left-hand side of the body

Optimized Oil Return: Designed with internal metering to ensure lubricant returns to the compressor sump consistently

This valve is the direct equivalent to the 474A-3/4-125 model

Reznor 204326 Pressure Switch 321894-708 The BASO Q90BB-1 Pilot BurnerThe Reznor 204326 Pressure Switch is a mission critical safety component designed for heavy duty HVACR applications, specifically within Reznor unit heaters and combustion air systems. This SPDT pressure switch features a precise 0. 7" WC (water column) set point, ensuring accurate monitoring of the pressure differential required for safe burner ignition and operation. Built with a dual 1 4" barb connection, it integrates seamlessly into standard