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Furnace & HVAC Gas Valves

Furnace & HVAC Gas Valves

Shop furnace and HVAC gas valves for natural gas and propane heating systems. Furnace Part Source carries single-stage, two-stage, and modulating gas valves, along with related fittings and regulators, from leading HVAC and combustion brands.

Use the product list below to find the correct gas valve by part number, fuel type, or equipment model. Always confirm the equipment model, fuel type, inlet and outlet pressure, and voltage before ordering, since gas valves are safety-critical components.

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    Maxitrol Selectra Modulation Product, Part # TS114

    Maxitrol

    MSRP: $189.37
    Now: $146.33
    Maxitrol® Selectra Modulation Product, Part # TS114; Discharge Air Sensor 55-90F   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts -...
    MSRP: $189.37
    Now: $146.33
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    MSRP: $189.37
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    Maxitrol Selectra Modulation Product, Part # TD114-1

    Maxitrol

    MSRP: $169.46
    Now: $130.94
    Maxitrol® Selectra Modulation Product, Part # TD114-1; Discharge Air (55-90f) W/120-170ovr   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine...
    MSRP: $169.46
    Now: $130.94
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    Maxitrol Selectra Modulation Product, Part # TD114

    Maxitrol

    MSRP: $163.68
    Now: $126.48
    Maxitrol® Selectra Modulation Product, Part # TD114; Discharge Air Selector 55-90f   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts -...
    MSRP: $163.68
    Now: $126.48
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    MSRP: $163.68
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    Maxitrol Gas Valve Part # A1014--Now sold as Maxitrol # A1014R

    Maxitrol

    MSRP: $259.84
    Now: $200.79
    Maxitrol Gas Valve Part # A1014--Now sold as Maxitrol # A1014R SELECTRA 40F-80F/MAX 160F-210F   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New...
    MSRP: $259.84
    Now: $200.79
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    Maxitrol Gas Valve Part #MR251E-1616

    Maxitrol

    MSRP: $1,546.45
    Now: $1,171.55
    Maxitrol® 2" Modulation valve ***This item is not available for the $12.50 shipping special***
    MSRP: $1,546.45
    Now: $1,171.55
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    Maxitrol Gas Valve Part #MR251D-1 1/4

    Maxitrol

    MSRP: $1,204.86
    Now: $912.78
    Maxitrol® 1 1/4" Modulating Valve IndirectFir   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order...
    MSRP: $1,204.86
    Now: $912.78
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    Maxitrol Gas Valve Part #MR212D-1-1212

    Maxitrol

    MSRP: $1,131.50
    Now: $857.20
    Maxitrol® 1 1/2" PosPresure Mod. Regular Valve ***This item is not available for the $12.50 shipping special***
    MSRP: $1,131.50
    Now: $857.20
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    Maxitrol Gas Valve Part #MR212D-1-88

    Maxitrol

    MSRP: $1,186.25
    Now: $898.68
    Maxitrol® 1" MOD/REG. Valve, PPS PRESS ***This item is not available for the $12.50 shipping special***
    MSRP: $1,186.25
    Now: $898.68
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    Maxitrol Gas Valve Part #MR212D-1-1010

    Maxitrol

    MSRP: $1,131.50
    Now: $857.20
    Maxitrol® 1 1/4"PosPressure Mod.RegulValve ***This item is not available for the $12.50 shipping special***
    MSRP: $1,131.50
    Now: $857.20
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    Maxitrol Gas Valve Part #MR212D-1010

    Maxitrol

    MSRP: $1,245.60
    Now: $962.51
    Maxitrol® 1 1/4"MOD/REG.Valve, NEG PRESS ***This item is not available for the $12.50 shipping special***
    MSRP: $1,245.60
    Now: $962.51
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    Maxitrol Gas Valve Part #MR212D-88

    Maxitrol

    MSRP: $1,245.60
    Now: $962.51
    Maxitrol Gas Valve Part #MR212D-88   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements
    MSRP: $1,245.60
    Now: $962.51
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    Maxitrol Gas Valve Part M411-1/2 (Minimum purchase 10 ea)

    Maxitrol

    MSRP: $242.06
    Now: $183.38
    Maxitrol Gas Valve Part M411-1/2 (Must buy 10 ea or order will be cancelled)   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts -...
    MSRP: $242.06
    Now: $183.38
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    Robertshaw Gas Valve Part #712-009

    Robertshaw

    MSRP: $611.46
    Now: $463.23
    Robertshaw® 1" Liquid Propane Ignition Kit Lockout, 24V Natural Gas; Exact replacement for Obsolete Johnstone Supply # L37-711; Functional replacement for obsolete Robertshaw® # 1750-017, 1750017
    MSRP: $611.46
    Now: $463.23
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Furnace & HVAC Gas Valves

The gas valve controls the flow of natural gas or propane to the burner, opening and closing at the correct point in the ignition sequence. Because gas valves directly affect combustion and safety, choosing the correct replacement part is especially important.

Furnace Part Source carries a range of gas valves for residential and light-commercial furnaces, boilers, and water heaters, including single-stage, two-stage, and modulating valve designs.

Common Gas Valve Types We Carry

Common gas valve types include:

  • Single-stage gas valves for standard-efficiency furnace and boiler applications.
  • Two-stage gas valves for equipment with high and low firing rates.
  • Modulating gas valves for equipment that adjusts firing rate continuously.
  • Combination gas valves that integrate the regulator, safety shutoff, and pilot functions.

How to Find the Right Gas Valve

Before ordering, check the equipment data plate and the existing gas valve for the model number, serial number, and part number. Confirm the fuel type, since natural gas and propane valves are not interchangeable without proper conversion.

For best fit, compare:

  • Original gas valve part number
  • Fuel type, such as natural gas or LP propane
  • Inlet and outlet pipe size
  • Voltage and staging (single-stage, two-stage, or modulating)
  • Equipment model and serial number

Because gas valves are safety-critical, installation or replacement should be performed by a qualified HVAC technician in accordance with local codes.

Gas Valves From Leading HVAC Brands

Our catalog includes gas valves from major manufacturers used across a wide range of residential and commercial heating equipment. Compatibility can vary by furnace or boiler series, so always verify the exact part number before ordering.

Need Help Matching a Gas Valve?

Not sure which gas valve you need? Use the model number, serial number, and part number from your unit to narrow the search, or contact Furnace Part Source for help identifying the correct replacement.

Gas Valve FAQs

Can I install a gas valve myself?

Gas valve replacement should be performed by a qualified HVAC technician, since improper installation can create a safety hazard. Always follow local codes and manufacturer instructions.

Are natural gas and propane valves interchangeable?

No. Natural gas and propane gas valves are calibrated differently and are not interchangeable without a proper conversion kit, if one is available from the manufacturer.

What are signs of a failing gas valve?

Signs may include the burner failing to ignite, weak or inconsistent flame, error codes on the control board, or a gas odor, which requires immediate professional attention.

What is the difference between single-stage and two-stage gas valves?

A single-stage valve provides one fixed firing rate, while a two-stage valve allows the furnace to operate at a lower rate for mild conditions and a higher rate for colder weather.