Ao Smith 100112699 Manifold Door Gasket

Product Description

The AO SMITH 100112699 is a manifold door gasket designed as a direct replacement component for water heater service and repair. The gasket seals the manifold door assembly, preventing combustion gas leakage and maintaining proper draft and combustion efficiency within the appliance. This part is installed by licensed plumbers and HVAC technicians during routine maintenance or when an original gasket shows signs of deterioration, compression set, or visible damage that compromises the seal.

This gasket is suited for residential water heater applications where the manifold door assembly requires resealing. It is used during service calls when the manifold door is removed for burner inspection, igniter service, or thermocouple replacement, and a fresh seal is required before reinstallation. Technicians should replace the gasket any time the manifold door has been disturbed and the original gasket shows wear.

Key Features

• OEM replacement gasket for AO SMITH water heater manifold door assemblies
• Maintains combustion seal integrity at the manifold door interface
• Prevents combustion gas bypass that can affect appliance efficiency and safety
• Designed for direct drop-in replacement without modification

Compatibility

Designed as an OEM-style replacement manifold door gasket for AO SMITH water heaters requiring part number 100112699.

Installation Notes

Installation should be performed by a licensed plumber or qualified service technician. Before servicing, shut off the gas supply and allow the appliance to cool completely. Remove the old gasket material fully and ensure the mating surfaces are clean and free of debris before seating the new gasket. Follow all applicable local codes and the manufacturer service documentation during reassembly.

Technical Specifications

• Product Type: Gasket
• Application: Replacement Part

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100112699