Can I use an aftermarket motor with a 3000 RPM rating instead

The solid 6H insert is preferred for new assemblies or when the shafts can be moved during installation for maximum structural integrity

Ensure proper grounding and follow the wiring diagram precisely to prevent short circuits or component damage

OEM Compatibility: Guaranteed fit for Marvair systems requiring a 24" 4-blade fan blade

Always verify your existing blower wheel pitch before installation

Lochinvar & A.O. Smith 100111990 Gas Valve 320788-703 Can I use an aftermarketAs a seasoned technician, you know that a call for a Lochinvar Knight boiler gas valve replacement usually means a high stakes repair where precision is non negotiable. The Lochinvar & A. O. Smith 100111990 Gas Valve is an OEM spec modulating gas valve engineered for precise air to fuel ratios in high efficiency hydronic systems. This component is a critical HVAC replacement part designed for specific series of the Lochinvar Knight and A. O. Smith BTR