this 3-blade unit ensures the clockwise (CW) rotation and 1/2-inch bore match the factory hub specifications

and mechanical dimensions

this kit integrates seamlessly with existing Parker Watts Fluid Air hardware to maintain factory-spec air purification

15mm orifice is frequently a core component in official Reznor conversion kits for specific BTU ratings and altitude adjustments

Installers should mount the device with the diaphragm in a vertical plane to maintain factory-specified set points

Johnson Controls VG7551ET Valve 323055-751 this 3-blade unit ensures theValve, Globe, 2 Way Normally Open, 1 2", Union Angle, 1. 8 Cv Equal Percentage Flow Cast Bronze Body with Brass Trim, Standard Threaded Stem and Push Down To Close Action