A.o. Smith 100108354 Gas Thermostat Natural Gas

Product Description

The A.O. SMITH 100108354 is a natural gas thermostat designed for heating applications requiring a long-shank configuration. The unit features a 2.625-inch shank length, making it suited for installations where standard-shank thermostats do not reach the correct depth within the gas valve or manifold assembly. This component regulates gas flow in response to temperature demand, maintaining set-point control within the heating system. It is typically installed by licensed plumbers or gas appliance technicians working on residential or light-commercial water heating or space heating equipment.

This thermostat is intended for natural gas heating systems where the long-shank design is specified by the original equipment manufacturer. The 2.625-inch shank length accommodates deeper-well installations in gas-fired appliances. Installers should verify shank length and connection thread compatibility with the target appliance before installation. No compatibility with liquid propane systems is stated in the available product data.

Key Features

• Natural gas (NG) fuel type for use in NG-only heating applications
• 2.625-inch shank length for deep-well thermostat pocket installations
• Heating application rated for gas-fired appliance temperature control
• Boxed packaging for protected handling and storage on the job site

Compatibility

Designed as an OEM-style replacement gas thermostat for natural gas heating appliances requiring a 2.625-inch shank. Verify shank length, thread size, and fuel type match the original thermostat specification before installation.

Installation Notes

Installation must be performed by a licensed gas technician or plumber in accordance with local codes and the appliance manufacturer's service documentation. Shut off the gas supply and allow the appliance to cool completely before removing the existing thermostat. Do not overtighten the shank fitting; follow the appliance manufacturer's torque guidance. Confirm the gas supply is leak-free using an approved leak-detection solution after reinstalling and restoring gas pressure.

Technical Specifications

• Application: Heating
• Fuel Type: Natural Gas (NG)
• Shank Length: 2.625 inches

Standard Information

• Brand: A.O. SMITH
• Manufacturer Part Number: 100108354