100187879 Lochinvar & A.O. Smith PYROLITE INSULATION DISK

The Lochinvar & A.O. Smith 100187879 Pyrolite Insulation Disk is a genuine OEM high‑temperature insulation component engineered to maintain thermal integrity and combustion efficiency in compatible Lochinvar and A.O. Smith water heaters and boilers.

Constructed from Pyrolite, a durable, heat‑resistant refractory material, this insulation disk provides a stable thermal barrier that protects surrounding components from extreme temperatures and supports consistent, efficient burner operation. It is designed for a precise OEM fit and long‑lasting performance in high‑heat zones such as burner assemblies, combustion chambers, and flue interfaces.

Direct OEM

• 100187879 — Lochinvar & A.O. Smith Pyrolite Insulation Disk (OEM replacement part; verified across Jackson Systems, PartsHnC, Hotwaterparts)

Equivalent / Same Part Number

• 100187879 (A.O. Smith OEM) — Factory repair part, ships in original packaging

Related Pyrolite / High‑Temp Insulation Components

• Pyrolite burner insulation disks

• Pyrolite refractory shields used in Lochinvar & A.O. Smith combustion assemblies (inference based on product family; not directly listed as cross‑references)

Technician Notes

• Pyrolite insulation disks must be installed by a licensed technician to maintain warranty.

• Replace when insulation shows cracking, erosion, hot spots, or heat‑stress deformation.

• Always verify compatibility with the specific water heater or boiler model.

• Supports stable combustion, reduces heat loss, and protects adjacent components.