Lochinvar & A.O. Smith 100173749 Door 318518-761 it maintains consistent manifold pressure

it maintains consistent manifold pressure via an adjustable servo regulator

the VS2517 must be paired with a compatible high-temperature actuator (typically the AH series) to ensure the paddle and internal seals operate within their specified thermal limits

swapping in this genuine OEM part is the fastest way to ensuring a reliable light-off

streamlining field service calls for technicians managing Fenwal 35-65 series replacements

Lochinvar & A.O. Smith 100173749 Door 318518-761 it maintains consistent manifold pressureThe Lochinvar & A. O. Smith 100173749 Heat Exchanger Access Door is a critical combustion chamber component engineered for Lochinvar Knight WB and SNA SLA series boilers. As a veteran grade OEM replacement part, this access door (WB model) ensures a high pressure seal for the heat exchanger assembly, facilitating essential annual maintenance and internal fire tube cleaning. Built with heavy duty materials to withstand high thermal stress, it maintains