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Gas Fittings

When dealing with gas piping systems, every connection must perform. Our Gas Fittings collection brings you the trusted adapters, unions, reducers, transitions and accessory components that tie your system together—whether you’re working with CSST, black steel, appliance hook-ups or retrofit installs.

What you’ll find in this collection:

  • CSST-to-threaded adapters, unions and couplings built for corrugated stainless steel tubing systems commonly used in modern gas supply. 

  • Appliance connection fittings and kits—brass male/female adapters, unions, reducing fittings—to hook up stoves, grills, boilers and other fuel-gas appliances cleanly and code-compliantly.

  • Transition fittings that adapt between piping types (CSST to NPT, CSST to steel pipe) and accessory parts to support installation (termination plates, unions, reducers).

  • Fittings rated for natural gas and propane applications, certified to industry standards and ready for residential or commercial systems.

Why Big Frog Supply? Because we understand that “just a fitting” can be the difference between safe system performance and trouble. We offer clear spec choices, trusted brands, and installation-smart advice so you build it right the first time.

  •

    TracPipe - FGP-TF1000-T750 - AutoFlare Tee-Reducer 1" x 1" x 3/4"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 105.73
    $ 105.73 - $ 105.73
    $ 105.73

    This product connects to Tracpipe/CounterStrike tubing on all 3 ends.Self-Flaring FittingAutoFlare is the self-piloting fitting that attaches TracP...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 105.73
    $ 105.73 - $ 105.73
    $ 105.73

  • TracPipe - FGP-CPLG-750 - AutoFlare Coupling 3/4"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 41.66
    $ 41.66 - $ 41.66
    $ 41.66

    AutoFlare® is the self-piloting fitting that attaches TracPipe®CounterStrike® to traditional gas fittings and appliances. No special tools or addit...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 41.66
    $ 41.66 - $ 41.66
    $ 41.66

  • TracPipe - FGP-FST-1250 - AutoFlare Straight 1 1/4"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 76.93
    $ 76.93 - $ 76.93
    $ 76.93

    Straight 1-1/4" Tracpipe Autoflare x 1-1/4" MNPT Brass FittingOverview:Transition fitting between TracPipe or CounterStrike Tubing and NPT thread. ...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 76.93
    $ 76.93 - $ 76.93
    $ 76.93

  • TracPipe - FGP-RST750-500 - AutoFlare Reducing 3/4" -1/2" NPT

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 24.08
    $ 24.08 - $ 24.08
    $ 24.08

    AutoFlare Straight Fitting (Male-NPT) Assembly for TracPipe and CounterStrike. AutoFlare® is the self-piloting fitting that attaches TracPipe® Coun...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 24.08
    $ 24.08 - $ 24.08
    $ 24.08

  • Omegaflex AutoSnap Tee-Todas las salidas 3/4

    TracPipe
    $ 67.61 - $ 67.61
    $ 67.61
    $ 67.61 - $ 67.61
    $ 67.61

    CARACTERÍSTICAS Los nuevos accesorios AutoSnap® con patente pendiente son los únicos accesorios CSST que no requieren ningún desmontaje o reensa...

    Ver todos los detalles
    $ 67.61 - $ 67.61
    $ 67.61
    $ 67.61 - $ 67.61
    $ 67.61

  • Omegaflex AutoSnap Tee-Todas las salidas 1/2

    TracPipe
    $ 69.13 - $ 69.13
    $ 69.13
    $ 69.13 - $ 69.13
    $ 69.13

    CARACTERÍSTICAS Los nuevos accesorios AutoSnap® con patente pendiente son los únicos accesorios CSST que no requieren ningún desmontaje o reens...

    Ver todos los detalles
    $ 69.13 - $ 69.13
    $ 69.13
    $ 69.13 - $ 69.13
    $ 69.13

  • Omegaflex AutoSnap Reductor 1/2-3/4 NPT

    TracPipe
    $ 18.45 - $ 18.45
    $ 18.45
    $ 18.45 - $ 18.45
    $ 18.45

    Los nuevos accesorios rectos AutoSnap® con patente pendiente son los únicos accesorios CSST que no requieren ningún desmontaje o reensamblaje del ...

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    $ 18.45 - $ 18.45
    $ 18.45
    $ 18.45 - $ 18.45
    $ 18.45
  • Home Flex 18-429-015 1-1/2 inch IPS underground yellow poly gas pipe coupler
    Agotado

    Home Flex - 18-429-015 - 1-1/2" IPS Underground Yellow Poly Gas Pipe Coupler

    Home Flex
    $ 0.00 - $ 0.00
    $ 0.00
    $ 89.99
    $ 89.99 - $ 89.99
    $ 89.99

    HOME-FLEX 18-429-015 1-1/2-Inch IPS Underground Poly Gas Pipe Coupling Brand: HOME-FLEX | SKU: 18-429-015 Product Overview The HOME-FLEX 18-429...

    Ver todos los detalles
    $ 0.00 - $ 0.00
    $ 0.00
    $ 89.99
    $ 89.99 - $ 89.99
    $ 89.99
    Agotado

  • TracPipe - FGP-TF1000T1000 - AutoFlare Tee - All Outlets 1" x 1"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 114.18
    $ 114.18 - $ 114.18
    $ 114.18

    This product connects to Tracpipe/CounterStrike tubing on all 3 ends.Self-Flaring FittingAutoFlare is the self-piloting fitting that attaches TracP...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 114.18
    $ 114.18 - $ 114.18
    $ 114.18

  • TracPipe - FGP-T750-750 - AutoFlare Tee - Female 3/4"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 61.47
    $ 61.47 - $ 61.47
    $ 61.47

    Self-Flaring FittingAutoFlare is the self-piloting fitting that attaches TracPipe CounterStrike to traditional gas fittings and appliances. No spec...

    Ver todos los detalles
    $ 0.00 - $ 0.00
    $ 0.00
    $ 61.47
    $ 61.47 - $ 61.47
    $ 61.47

  • TracPipe - FGP-RFG-1250 - AutoFlare Steel Flange Fitting 1-1/4"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 82.90
    $ 82.90 - $ 82.90
    $ 82.90

    AutoFlare® is the self-piloting fitting that attaches TracPipe®CounterStrike® to traditional gas fittings and appliances. No special tools or addit...

    Ver todos los detalles
    $ 0.00 - $ 0.00
    $ 0.00
    $ 82.90
    $ 82.90 - $ 82.90
    $ 82.90

  • TracPipe - FGP-RFG-750 - AutoFlare Steel Flange Fitting 3/4"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 25.38
    $ 25.38 - $ 25.38
    $ 25.38

    AutoFlare® is the self-piloting fitting that attaches TracPipe®CounterStrike® to traditional gas fittings and appliances. No special tools or addit...

    Ver todos los detalles
    $ 0.00 - $ 0.00
    $ 0.00
    $ 25.38
    $ 25.38 - $ 25.38
    $ 25.38

  • TracPipe - FGP-RST500-750 - AutoFlare Reducing 1/2" -3/4" NPT

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 18.10
    $ 18.10 - $ 18.10
    $ 18.10

    AutoFlare Straight Fitting (Male-NPT) Assembly for TracPipe and CounterStrike. AutoFlare® is the self-piloting fitting that attaches TracPipe® Coun...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 18.10
    $ 18.10 - $ 18.10
    $ 18.10

  • TracPipe - FGP-FST-375N - AutoFlare Straight 3/8" x 3/8 NPT

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 15.26
    $ 15.26 - $ 15.26
    $ 15.26

    Straight 3/8" Tracpipe Autoflare x 3/8" MNPT Brass FittingOverview:Transition fitting between TracPipe or CounterStrike Tubing and NPT thread. F...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 15.26
    $ 15.26 - $ 15.26
    $ 15.26

  • Acoplamiento Omegaflex AutoSnap 1 1/4

    TracPipe
    $ 118.38 - $ 118.38
    $ 118.38
    $ 118.38 - $ 118.38
    $ 118.38

    CARACTERÍSTICAS Los nuevos accesorios AutoSnap® con patente pendiente son los únicos accesorios CSST que no requieren ningún desmontaje o montaje ...

    Ver todos los detalles
    $ 118.38 - $ 118.38
    $ 118.38
    $ 118.38 - $ 118.38
    $ 118.38

  • Acoplamiento Omegaflex AutoSnap 3/4

    TracPipe
    $ 39.82 - $ 39.82
    $ 39.82
    $ 39.82 - $ 39.82
    $ 39.82

    CARACTERÍSTICAS Los nuevos accesorios AutoSnap® con patente pendiente son los únicos accesorios CSST que no requieren ningún desmontaje o reensa...

    Ver todos los detalles
    $ 39.82 - $ 39.82
    $ 39.82
    $ 39.82 - $ 39.82
    $ 39.82
  • Home Flex 18-429-020 2 inch IPS underground yellow poly gas pipe coupler

    Home Flex - 18-429-020 - 2" IPS Underground Yellow Poly Gas Pipe Coupler

    Home Flex
    $ 0.00 - $ 0.00
    $ 0.00
    $ 121.99
    $ 121.99 - $ 121.99
    $ 121.99

    HOME-FLEX 18-429-020 2-Inch IPS Underground Poly Gas Pipe Coupling Brand: HOME-FLEX | SKU: 18-429-020 Product Overview The HOME-FLEX 18-429-020...

    Ver todos los detalles
    $ 0.00 - $ 0.00
    $ 0.00
    $ 121.99
    $ 121.99 - $ 121.99
    $ 121.99
  • Home Flex 18-406-020 2 inch IPS underground yellow poly gas pipe 90-degree elbow

    Home Flex - 18-406-020 - 2" IPS Underground Yellow Poly Gas Pipe 90-Degree Elbow

    Home Flex
    $ 0.00 - $ 0.00
    $ 0.00
    $ 118.99
    $ 118.99 - $ 118.99
    $ 118.99

    HOME-FLEX 18-406-020 2-Inch IPS Underground Poly Gas Pipe 90-Degree Elbow Brand: HOME-FLEX | SKU: 18-406-020 Product Overview The HOME-FLEX 18-...

    Ver todos los detalles
    $ 0.00 - $ 0.00
    $ 0.00
    $ 118.99
    $ 118.99 - $ 118.99
    $ 118.99
  • Home Flex 18-406-005 1/2 inch IPS underground yellow poly gas pipe 90-degree elbow

    Home Flex - 18-406-005 - 1/2" IPS Underground Yellow Poly Gas Pipe 90-Degree Elbow

    Home Flex
    $ 0.00 - $ 0.00
    $ 0.00
    $ 25.99
    $ 25.99 - $ 25.99
    $ 25.99

    HOME-FLEX 18-406-005 1/2-Inch IPS Underground Poly Gas Pipe 90-Degree Elbow Brand: HOME-FLEX | SKU: 18-406-005 Product Overview The HOME-FLEX 1...

    Ver todos los detalles
    $ 0.00 - $ 0.00
    $ 0.00
    $ 25.99
    $ 25.99 - $ 25.99
    $ 25.99
  • Crown Industries GFS050M 5/8 inch flare x 1/2 inch MIP gas adapter
    Agotado

    Adaptador de gas MIP de 5/8" x 1/2" Crown Industries

    Crown Industries
    $ 2.67 - $ 2.67
    $ 2.67
    $ 2.67 - $ 2.67
    $ 2.67

    Adaptador de extremo de gas de 5/8 OD Flare x 1/2 MIP (roscado 1/2" FIP).

    $ 2.67 - $ 2.67
    $ 2.67
    $ 2.67 - $ 2.67
    $ 2.67
    Agotado

  • TracPipe - FGP-TF1250-T500 - AutoFlare Tee-Reducer 1 1/4 "x 1 1/4"x 1/2"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 242.51
    $ 242.51 - $ 242.51
    $ 242.51

    This product connects to Tracpipe/CounterStrike tubing on all 3 ends.Self-Flaring FittingAutoFlare is the self-piloting fitting that attaches TracP...

    Ver todos los detalles
    $ 0.00 - $ 0.00
    $ 0.00
    $ 242.51
    $ 242.51 - $ 242.51
    $ 242.51
  • Omega TracPipe - Auto Flare Meter Termination - - Mechanical - Big Frog Supply

    Terminación del medidor de antorcha automática Omegaflex

    TracPipe
    $ 82.69 - $ 82.69
    $ 82.69
    $ 82.69 - $ 82.69
    $ 82.69

    Para uso con tubos Counterstrike. Disponible en tamaño de 3/4" y 1".

    $ 82.69 - $ 82.69
    $ 82.69
    $ 82.69 - $ 82.69
    $ 82.69

  • Acoplamiento Omegaflex AutoSnap 1/2

    TracPipe
    $ 28.94 - $ 28.94
    $ 28.94
    $ 28.94 - $ 28.94
    $ 28.94

    CARACTERÍSTICAS Los nuevos accesorios AutoSnap® con patente pendiente son los únicos accesorios CSST que no requieren ningún desmontaje o reensa...

    Ver todos los detalles
    $ 28.94 - $ 28.94
    $ 28.94
    $ 28.94 - $ 28.94
    $ 28.94
  • Titan Press TPXL0114G 1-1/4 inch extended no-stop coupling for HNBR gas carbon steel systems
    Agotado

    Titan Press TPXL0114G 1-1/4 in. P x P Extended No-Stop Coupling, HNBR Gas, Carbon Steel

    Everflow Supplies
    $ 0.00 - $ 0.00
    $ 0.00
    $ 52.08
    $ 52.08 - $ 52.08
    $ 52.08

    Titan Press TPXL0114G 1-1/4 in. P x P Extended No-Stop Coupling Brand: Everflow Supplies | SKU: TPXL0114G Product Overview Extended carbon stee...

    Ver todos los detalles
    $ 0.00 - $ 0.00
    $ 0.00
    $ 52.08
    $ 52.08 - $ 52.08
    $ 52.08
    Agotado

Pro tip: Before you purchase, identify the type of gas piping you’re connecting to (CSST, black iron, soft stainless), confirm fuel type (natural or LP), ensure certification for the fitting, and check for bonding/grounding requirements on CSST runs. Using matched system components helps reduce leak-risk and keeps installs code-compliant.

Browse the collection, select the correct fitting for your system, and install with confidence.

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