Reliance / Resideo 100112336 Natural Gas Water Heater Control Valve Thermostat 5″ WC 1″ Cavity HW/R Kit

Condition: New in box. Outer cardboard packaging shows shelf wear, tape marks, scuffs, edge wear, and minor label wear from storage/handling.

This Reliance / Resideo natural gas water heater control thermostat is a replacement gas control valve kit intended for compatible residential and light-commercial gas-fired water heaters. The box label identifies the item as K, GAS CONT, NAT, 5″ WC, 1″ CAV, HW/R, with Legacy Part No. 9007884005 and Material No. 100112336. It is designed for natural gas service and regulates burner gas flow while controlling water temperature through the integrated thermostat assembly. This type of valve is commonly used in tank-style water heater repair where the original gas control has failed, will not maintain pilot operation, will not call for burner heat, or no longer regulates temperature properly.

Features

• Product type: Gas control valve / water heater thermostat kit
• Fuel type: Natural gas
• Outlet pressure rating shown on label: 5″ WC
• Cavity size shown on label: 1″ CAV
• Configuration noted on label: HW/R
• Material / part number: 100112336
• Legacy part number: 9007884005
• UPC / barcode: 020363173050
• Quantity: 1 unit per box
• CSA listed marking visible on packaging
• Designed for gas-fired tank water heater burner control
• Combines thermostat temperature control and gas valve safety control functions
• Intended as a replacement service part, not a universal fit-all component
• Suitable for professional HVAC/plumbing replacement work
• Packaging includes California Proposition 65 warning label

Applications

This gas control thermostat is commonly used in:

• Residential natural gas tank water heaters
• Replacement of failed water heater gas control valves
• Plumbing service and water heater repair
• HVAC and mechanical maintenance inventory
• Property maintenance for apartments, rental homes, and utility rooms
• Light-commercial domestic hot water systems using compatible tank-style heaters
• Service calls involving pilot, burner, temperature regulation, or gas valve control issues

Cross-Referenced Models

• Reliance 100112336
• Reliance 9007884005
• Resideo 100112336
• Resideo / Honeywell-style water heater gas control thermostat, 5″ WC, natural gas
• AO Smith / State / American-style service replacement gas control valve applications where part 100112336 is specified
• Natural gas water heater thermostat kit marked K, GAS CONT, NAT, 5″ WC, 1″ CAV, HW/R

Compatibility must be confirmed by matching the original water heater model, serial number, fuel type, inlet/outlet configuration, temperature sensor style, burner system, and manufacturer service parts list.

Comparable Products

• Resideo / Honeywell natural gas water heater control valves
• Reliance natural gas water heater thermostat control kits
• White-Rodgers / Emerson natural gas water heater gas control valves
• Robertshaw natural gas water heater thermostatic gas valves
• AO Smith OEM natural gas control valve service kits
• State Water Heaters OEM gas thermostat assemblies
• American Water Heaters gas valve thermostat replacement kits

Larger System Compatibility

This component functions as part of a complete gas-fired tank water heater control and combustion system. It typically works with the following related assemblies:

• Burner assembly
• Pilot assembly or ignition system
• Thermocouple, thermopile, or flame-sensing safety circuit, depending on model
• Main burner manifold
• Gas supply piping and shutoff valve
• Water heater tank thermostat well/cavity
• Draft hood or combustion venting system
• Residential domestic hot water plumbing system

This item should be installed only on water heaters for which 100112336 / 9007884005 is the correct manufacturer-approved service part. Gas components require leak testing, combustion verification, and code-compliant installation by a qualified technician.

Installation Notes

• Verify the heater uses natural gas, not LP/propane.
• Confirm the required gas control outlet pressure is 5″ WC.
• Match the control cavity, thread style, sensor length, and burner/pilot connections before installation.
• Replace damaged gaskets, fittings, or pilot tubing as required by the appliance service manual.
• After installation, perform a gas leak test and verify proper burner ignition and shutdown.
• Do not install if the water heater rating plate or parts diagram calls for a different gas control valve.

Related

Reliance gas control valve, Resideo water heater thermostat, Honeywell water heater gas valve, 100112336 gas control, 9007884005 water heater valve, natural gas thermostat valve, 5 inch WC gas valve, water heater burner control, water heater gas regulator, gas control thermostat, water heater temperature control valve, tank water heater gas control, hot water heater gas valve, device to regulate burner gas flow, natural gas water heater repair part, water heater pilot control valve.

Common Requests:

1. Reliance 100112336 natural gas water heater control valve replacement
2. Resideo 9007884005 5 inch WC gas control thermostat for water heater
3. Natural gas water heater valve with 1 inch cavity HW/R configuration
4. Honeywell-style water heater gas thermostat control valve 020363173050
5. Replacement gas control valve for Reliance natural gas tank water heater

P128; B006; GT00214