The unit features Rotolock fittings: the suction side is 2-1/4" and the discharge side is 1-3/4"

it is recommended to use the designated OEM part number for your specific fuel source to maintain valve certification and pressure accuracy

maintaining exterior surface temperatures within safe limits

mineral scale is likely present

For optimal performance and to prevent oil trapping in the pilot assembly

Heil Quaker ICP 1172712 Fan Blade 322027-701 The unit features Rotolock fittings:The Heil Quaker ICP 1172712 Fan Blade is a critical OEM replacement part designed for high performance condensing units and split system heat pumps. Engineered to maintain the precise thermal balance of your HVAC system, this condenser fan blade features a 20 inch diameter and a 24 degree pitch, optimized for maximum CFM (cubic feet per minute) output with minimal vibration. This 2 blade assembly is specifically balanced for clockwise (CW) rotation