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Enjoy fast and free shipping on all orders over $89! Contact us (855) 424-4376

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.

  •

    Home Flex - 18-429-007 - 3/4" IPS Underground Yellow Poly Gas Pipe Coupler

    Home Flex
    $ 23.99 - $ 23.99
    $ 23.99
    $ 23.99 - $ 23.99
    $ 23.99

    Install Manual    The HOME-FLEX underground in. Pipe Coupler allows you to safely and easily connect two pieces of polyethylene gas piping. Simply ...

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    $ 23.99 - $ 23.99
    $ 23.99
    $ 23.99 - $ 23.99
    $ 23.99

  • TracPipe - FGP-FST-500 - AutoFlare Straight 1/2"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 16.75
    $ 16.75 - $ 16.75
    $ 16.75

    Straight 1/2" Tracpipe Autoflare x 1/2" MNPT Brass FittingOverview:Transition fitting between TracPipe or CounterStrike Tubing and NPT thread. Fitt...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 16.75
    $ 16.75 - $ 16.75
    $ 16.75
  • Omega TracPipe - TracPipe Standard 1/2" Tee - - Mechanical - Big Frog Supply

    Omegaflex - FGP-TF500-T500 - TracPipe Standard 1/2" Tee

    TracPipe
    $ 64.95 - $ 64.95
    $ 64.95
    $ 64.95 - $ 64.95
    $ 64.95

    1/2" tee used in Omega TracPipe systems.

    $ 64.95 - $ 64.95
    $ 64.95
    $ 64.95 - $ 64.95
    $ 64.95

  • TracPipe - FGP-FST-750 - AutoFlare Straight 3/4"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 22.42
    $ 22.42 - $ 22.42
    $ 22.42

    Straight 3/4" Tracpipe Autoflare x 3/4" MNPT Brass FittingOverview:Transition fitting between TracPipe or CounterStrike Tubing and NPT thread. F...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 22.42
    $ 22.42 - $ 22.42
    $ 22.42

  • Home Flex - 18-401-007 - 3/4" IPS Underground Yellow Poly Gas Pipe Tee

    Home Flex
    $ 38.54 - $ 38.54
    $ 38.54
    $ 38.54 - $ 38.54
    $ 38.54

    Install Manual   The HOME-FLEX underground 3/4 in. Tee allows you to safely and easily expand your system. Simply slide the lock ring over the pipe...

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    $ 38.54 - $ 38.54
    $ 38.54
    $ 38.54 - $ 38.54
    $ 38.54

  • TracPipe - FGP-FSTF-750 - AutoFlare Female Straight 3/4"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 28.05
    $ 28.05 - $ 28.05
    $ 28.05

    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
    $ 28.05
    $ 28.05 - $ 28.05
    $ 28.05

  • Home Flex - 18-406-007 - 3/4" IPS Underground Yellow Poly Gas Pipe 90-Degree Elbow

    Home Flex
    $ 24.79 - $ 24.79
    $ 24.79
    $ 24.79 - $ 24.79
    $ 24.79

    Install Manual  The HOME-FLEX underground 3/4 in. Elbow allows you to safely and easily make a 90° turn. Simply slide the lock ring over the pipe...

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    $ 24.79 - $ 24.79
    $ 24.79
    $ 24.79 - $ 24.79
    $ 24.79
  • Sold out

    TracPipe - FGP-FSTF-500 - AutoFlare Female Straight 1/2"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 16.46
    $ 16.46 - $ 16.46
    $ 16.46

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

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 16.46
    $ 16.46 - $ 16.46
    $ 16.46
    Sold out
  • Sold out

    TracPipe - FGP-FST-1000 - AutoFlare Straight 1"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 35.25
    $ 35.25 - $ 35.25
    $ 35.25

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

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 35.25
    $ 35.25 - $ 35.25
    $ 35.25
    Sold out
  • Omega TracPipe - Reducing TracPipe Tee 3/4x3/4x1/2 - - Mechanical - Big Frog Supply
    Sold out

    Omegaflex - FGP-TF750-T500 - Reducing TracPipe Tee 3/4x3/4x1/2

    TracPipe
    $ 89.57 - $ 89.57
    $ 89.57
    $ 89.57 - $ 89.57
    $ 89.57

    3/4" x 3/4" x 1/2" reducing tee for TracPipe systems.

    $ 89.57 - $ 89.57
    $ 89.57
    $ 89.57 - $ 89.57
    $ 89.57
    Sold out

  • Home Flex - 18-429-010 - 1" IPS Underground Yellow Poly Gas Pipe Coupler

    Home Flex
    $ 30.48 - $ 30.48
    $ 30.48
    $ 30.48 - $ 30.48
    $ 30.48

    Install Manual    The HOME-FLEX underground in. Pipe Coupler allows you to safely and easily connect two pieces of polyethylene gas piping. Simply ...

    View full details
    $ 30.48 - $ 30.48
    $ 30.48
    $ 30.48 - $ 30.48
    $ 30.48
  • Omega TracPipe - Reducing TracPipe Tee 3/4x1/2x1/2 - - Mechanical - Big Frog Supply

    Omegaflex - FGP-RT-752 - Reducing TracPipe Tee 3/4x1/2x1/2

    TracPipe
    $ 80.42 - $ 80.42
    $ 80.42
    $ 80.42 - $ 80.42
    $ 80.42

    3/4" x 1/2" x 1/2" reducing tee for TracPipe systems.

    $ 80.42 - $ 80.42
    $ 80.42
    $ 80.42 - $ 80.42
    $ 80.42
  • Sold out

    TracPipe - FGP-FST-1500 - AutoFlare Straight 1 1/2"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 158.19
    $ 158.19 - $ 158.19
    $ 158.19

    Straight 1-1/2" Tracpipe Autoflare x 1-1/2" MNPT Brass FittingOverview:Transition fitting between TracPipe or CounterStrike Tubing and NPT thread. ...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 158.19
    $ 158.19 - $ 158.19
    $ 158.19
    Sold out

  • TracPipe - FGP-RFG-500 - AutoFlare Steel Flange Fitting 1/2"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 20.91
    $ 20.91 - $ 20.91
    $ 20.91

    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
    $ 20.91
    $ 20.91 - $ 20.91
    $ 20.91
  • Sold out

    TracPipe - FGP-FST-375 - AutoFlare Straight 3/8" (1/2 NPT)

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

    Straight 3/8" Tracpipe Autoflare x 1/2" MNPT Brass FittingOverview:Transition fitting between TracPipe or CounterStrike Tubing and NPT thread. Fitt...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 15.26
    $ 15.26 - $ 15.26
    $ 15.26
    Sold out

  • Omegaflex - FGP-SFSTF-1000 - AutoSnap Female Straight 1 Inch

    TracPipe
    $ 33.17 - $ 33.17
    $ 33.17
    $ 33.17 - $ 33.17
    $ 33.17

    The new patent pending AutoSnap® fittings are the only CSST fittings that do not require any disassembly or reassembly of the fitting to the Counte...

    View full details
    $ 33.17 - $ 33.17
    $ 33.17
    $ 33.17 - $ 33.17
    $ 33.17

  • Omegaflex - FGP-SFSTF-750 - AutoSnap Female Straight 3/4 Inch

    TracPipe
    $ 21.47 - $ 21.47
    $ 21.47
    $ 21.47 - $ 21.47
    $ 21.47

    Omega Flex - FGP-SFST-750 0.75" NPT AutoSnap Straight Fitting for 0.75" CounterStrike The new patent pending AutoSnap® straight fittings are the on...

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    $ 21.47 - $ 21.47
    $ 21.47
    $ 21.47 - $ 21.47
    $ 21.47

  • TracPipe - FGP-T500-500 - AutoFlare Tee - Female 1/2"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 45.14
    $ 45.14 - $ 45.14
    $ 45.14

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

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 45.14
    $ 45.14 - $ 45.14
    $ 45.14

  • TracPipe - FGP-FSTF-1000 - AutoFlare Female Straight 1"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 34.66
    $ 34.66 - $ 34.66
    $ 34.66

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

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 34.66
    $ 34.66 - $ 34.66
    $ 34.66

  • Omegaflex - FGP-STF750-T500 - AutoSnap Tee Reducer 3/4 X 3/4 X 1/2

    TracPipe
    $ 70.40 - $ 70.40
    $ 70.40
    $ 70.40 - $ 70.40
    $ 70.40

    The new patent pending AutoSnap® fittings are the only CSST fittings that do not require any disassembly or reassembly of the fitting to the Counte...

    View full details
    $ 70.40 - $ 70.40
    $ 70.40
    $ 70.40 - $ 70.40
    $ 70.40

  • Omegaflex - FGP-SFST-375 - AutoSnap Straight 3/8 Inch

    TracPipe
    $ 11.78 - $ 11.78
    $ 11.78
    $ 11.78 - $ 11.78
    $ 11.78

    The new patent pending AutoSnap® fittings are the only CSST fittings that do not require any disassembly or reassembly of the fitting to the Counte...

    View full details
    $ 11.78 - $ 11.78
    $ 11.78
    $ 11.78 - $ 11.78
    $ 11.78
  • Crown Industries - 5/8" Flare x 1/2" FIP Gas Adapter - - Mechanical - Big Frog Supply
    Sold out

    Crown Industries - GFS050F - 5/8" Flare x 1/2" FIP Gas Adapter

    Crown Industries
    $ 2.55 - $ 2.55
    $ 2.55
    $ 2.55 - $ 2.55
    $ 2.55

    5/8" OD Flare x 1/2" FIP Gas End Fitting Adapter.

    $ 2.55 - $ 2.55
    $ 2.55
    $ 2.55 - $ 2.55
    $ 2.55
    Sold out
  • Sold out

    TracPipe - FGP-TF1000-T500 - AutoFlare Tee-Reducer 1" x 1" x 1/2"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 100.10
    $ 100.10 - $ 100.10
    $ 100.10

    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
    $ 100.10
    $ 100.10 - $ 100.10
    $ 100.10
    Sold out

  • TracPipe - FGP-T750-500 - AutoFlare Tee - Female 3/4"-1/2"

    TracPipe
    $ 0.00 - $ 0.00
    $ 0.00
    $ 59.39
    $ 59.39 - $ 59.39
    $ 59.39

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

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 59.39
    $ 59.39 - $ 59.39
    $ 59.39

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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