Lochinvar & A.O. Smith 100291510 Cartridge 319825-402 Always verify your specific model

Always verify your specific model and serial number against the manufacturer’s parts list to ensure the correct staging logic

The NEMA 1 enclosure provides essential protection for indoor electrical components

Streamlined Installation: Features a standard oven run capacitor footprint and terminal layout

Does this sensor detect Propane as well

We recommend inspecting the mounting surface and using a high-temp silicone sealant or a new mounting gasket during installation to ensure a gas-tight seal at the collector box

Lochinvar & A.O. Smith 100291510 Cartridge 319825-402 Always verify your specific modelThe Lochinvar & A. O. Smith 100291510 Cartridge is a critical OEM maintenance component designed specifically for the PP AS20 Product Preservers anti scale system. As a veteran technician knows, hard water scale acts as a thermal insulator, significantly reducing heat transfer efficiency in tankless water heaters and boilers. This replacement antiscale cartridge utilizes a specialized media blend that chemically sequesters scale forming minerals like