8-Inch Stainless Steel Probe: Durable 304 SS construction resists corrosion and provides ample reach for accurate cross-sectional duct sensing

and G760BAD-2

Standard field practice involves ensuring the mounting surface is clear of old adhesive or scale

the internal diaphragm or snap-acting contacts may have failed

Contractors should verify the hub bore size and rotation direction to ensure seamless integration into existing blower housings

Armstrong Fluid Technology 816303-317K Impeller Kit 320788-703 8-Inch Stainless Steel Probe: DurableThe Armstrong Fluid Technology 816303 317K Impeller Kit is a precision engineered OEM replacement part designed to restore the hydraulic efficiency of high performance circulator pumps. This comprehensive kit features a 5. 25 inch Noryl impeller, a high strength thermoplastic known for its exceptional dimensional stability and resistance to corrosion and scaling in demanding HVACR systems. By utilizing an injection molded replacement impeller kit,