Ao Smith 100111371 Gas Control Valve Thermostat Natural Gas

Product Description

The AO SMITH 100111371 is a natural gas control valve and thermostat assembly with lead wires, designed as a replacement part for residential water heater systems using hot surface ignition (HSI) controls. This combination valve regulates gas flow and water temperature in one integrated unit, serving as a core safety and control component in the water heater's gas train. Licensed plumbers and water heater service technicians install this part during routine valve replacement or system troubleshooting. The lead wire configuration supports direct connection to the HSI control circuit without requiring additional wire splicing at the valve body.

This valve is a direct replacement for AO SMITH Series 200 and 201 water heaters equipped with natural gas burner assemblies. It is compatible with both 40-gallon and 50-gallon model variants across the GVR, XVR, XGV, and GVRL product lines. Typical installation scenarios include valve failure replacement, thermostat drift correction, or gas shutoff malfunction service on residential storage-type gas water heaters. The included lead wires simplify reconnection to the existing HSI ignition board harness during swap-out service calls.

Key Features

• Natural gas (NG) configuration for residential water heater applications
• Integrated gas valve and thermostat in a single assembly
• Includes pre-attached lead wires for HSI control board connection
• Designed for Series 200 and 201 water heater platforms
• Direct OEM-style replacement reduces diagnostic and installation time

Compatibility

Compatible with AO SMITH Series 200 and 201 water heaters. Confirmed model fitment includes: GVR-40, GVR-50, XVR-40, XVR-50, XGV-40, XGV-50, and GVRL-40.

Installation Notes

This part should be installed by a licensed plumber or qualified water heater service technician in accordance with local plumbing codes and the International Fuel Gas Code (IFGC). Before beginning work, shut off the gas supply at the nearest upstream manual shutoff valve and allow the system to cool completely. Do not overtighten the valve body connections or disturb the flue assembly during replacement. After installation, verify all gas connections with an approved leak detection solution before returning the appliance to service.

Technical Specifications

• Fuel Type: Natural Gas (NG)
• Control Type: HSI (Hot Surface Ignition)
• Component Type: Gas Control Valve and Thermostat Assembly
• Lead Wires: Included
• Compatible Series: 200, 201
• Part Category: Replacement Part

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100111371