Superior Flame Monitoring: Directly replaces the gold-standard Honeywell C554A1216

always verify the specific FLA (Full Load Amps) of your equipment against the switch data plate to ensure proper sizing

it incorporates a double-ring

it is designed for universal fitment across the VT and VS series valve bodies

Lochinvar & A.O. Smith 100291509 Anti-Scale System R-410A Superior Flame Monitoring: Directly replacesThe Lochinvar & A. O. Smith 100291509 Anti Scale System, also known as the PP AS20, is a standalone water treatment system designed to mitigate hard water scale in high efficiency tankless water heaters and commercial boilers. Utilizing advanced Template Assisted Crystallization (TAC) technology, this unit converts dissolved calcium and magnesium minerals into inactive microscopic crystals. These crystals remain suspended in the water and pass safely