Lochinvar & A.O. Smith 100233544 Bottom 318973-401 including the specific 5/8-inch bore

including the specific 5/8-inch bore requirement

Designed as a professional-grade pilot igniter kit

This Rheem expansion valve features 3/8" x 3/8" connections

we recommend annual replacement

this pneumatic pressure sensor is essential for sensitive applications such as cleanroom monitoring

Lochinvar & A.O. Smith 100233544 Bottom 318973-401 including the specific 5/8-inch boreThe Lochinvar & A. O. Smith 100233544 Bottom Insulation is a critical OEM replacement component designed specifically for high efficiency commercial and residential water heaters and boilers. This high density combustion chamber insulation provides essential thermal protection for the unit base, ensuring optimal heat retention and preventing thermal damage to external surfaces. Engineered for compatibility with select A. O. Smith series and Lochinvar