Lennox 18L11 Conversion Kit 318423-701 the Parker H-23R is commonly

the Parker H-23R is commonly found on liquid line and suction line solenoid valves

This mixing tube is designed to work with Maxitrol TS series sensors

in most electric furnace configurations

If your control board was recently replaced with a direct-drive 80V version

the 100110729 is the manufacturer-specified updated version for FS6679-1338

Lennox 18L11 Conversion Kit 318423-701 the Parker H-23R is commonlyThe Lennox 18L11 LP Conversion Kit (617168 01) is the essential field service solution for transitioning Lennox compact unit heaters from natural gas to liquid propane. This OEM Lennox conversion kit is engineered specifically for LF25, LS25, and UHRS series units ranging from 30k to 105k BTUs. As a direct replacement for Lennox 45L85 and 617168 01, it ensures precise manifold pressure regulation when paired with White Rodgers 36G series gas valves.