Technicians can rely on the 1/4" OD compression fittings for secure tubing connections

this requires a technician to manually press the reset button once pressures return to a safe range (below 475 PSI)

The HD42AQ253 is designated for CCW (Counterclockwise) rotation when viewed from the lead end/opposite shaft end

The cutout point is adjusted via a range screw located at the top of the unit

While the board is a plug-and-play mechanical interface

Lochinvar & A.O. Smith 100111381 Pilot Assembly 320788-702 Technicians can rely on theThe Lochinvar & A. O. Smith 100111381 Pilot Assembly is a high precision OEM component specifically engineered for Liquid Propane (LP) water heaters. Designed for the 200 and 201 series, this assembly is a direct replacement for HSI control valves in 40 and 50 gallon residential units. As a veteran grade LP pilot assembly with tubing, it ensures reliable pilot flame rectification and consistent ignition cycles, preventing common lockout issues