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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.

  • Titan Press TPEC0034G 3/4 inch cap for HNBR gas carbon steel press systems
    Sold out

    Titan Press TPEC0034G 3/4 in. P Cap, HNBR Gas, Carbon Steel

    Everflow Supplies
    $ 0.00 - $ 0.00
    $ 0.00
    $ 14.54
    $ 14.54 - $ 14.54
    $ 14.54

    Titan Press TPEC0034G 3/4 in. P Cap Brand: Everflow Supplies | SKU: TPEC0034G Product Overview The Titan Press TPEC0034G is a carbon steel pres...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 14.54
    $ 14.54 - $ 14.54
    $ 14.54
    Sold out
  • Titan Press TPEC0012G 1/2 inch cap for HNBR gas carbon steel press systems
    Sold out

    Titan Press TPEC0012G 1/2 in. P Cap, HNBR Gas, Carbon Steel

    Everflow Supplies
    $ 0.00 - $ 0.00
    $ 0.00
    $ 13.90
    $ 13.90 - $ 13.90
    $ 13.90

    Titan Press TPEC0012G 1/2 in. P Cap Brand: Everflow Supplies | SKU: TPEC0012G Product Overview The Titan Press TPEC0012G is a carbon steel pres...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 13.90
    $ 13.90 - $ 13.90
    $ 13.90
    Sold out
  • Titan Press TPCP0114G 1-1/4 inch coupling for HNBR gas carbon steel press systems
    Sold out

    Titan Press TPCP0114G 1-1/4 in. P x P Coupling, HNBR Gas, Carbon Steel

    Everflow Supplies
    $ 0.00 - $ 0.00
    $ 0.00
    $ 24.44
    $ 24.44 - $ 24.44
    $ 24.44

    Titan Press TPCP0114G 1-1/4 in. P x P Coupling Brand: Everflow Supplies | SKU: TPCP0114G Product Overview The Titan Press TPCP0114G is a carbon...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 24.44
    $ 24.44 - $ 24.44
    $ 24.44
    Sold out
  • Titan Press TPCP0100G 1 inch coupling for HNBR gas carbon steel press systems
    Sold out

    Titan Press TPCP0100G 1 in. P x P Coupling, HNBR Gas, Carbon Steel

    Everflow Supplies
    $ 0.00 - $ 0.00
    $ 0.00
    $ 19.04
    $ 19.04 - $ 19.04
    $ 19.04

    Titan Press TPCP0100G 1 in. P x P Coupling Brand: Everflow Supplies | SKU: TPCP0100G Product Overview The Titan Press TPCP0100G is a carbon ste...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 19.04
    $ 19.04 - $ 19.04
    $ 19.04
    Sold out
  • Titan Press TPCP0034G 3/4 inch coupling for HNBR gas carbon steel press systems
    Sold out

    Titan Press TPCP0034G 3/4 in. P x P Coupling, HNBR Gas, Carbon Steel

    Everflow Supplies
    $ 0.00 - $ 0.00
    $ 0.00
    $ 12.88
    $ 12.88 - $ 12.88
    $ 12.88

    Titan Press TPCP0034G 3/4 in. P x P Coupling Brand: Everflow Supplies | SKU: TPCP0034G Product Overview The Titan Press TPCP0034G is a carbon s...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 12.88
    $ 12.88 - $ 12.88
    $ 12.88
    Sold out
  • Titan Press TPCP0012G 1/2 inch coupling for HNBR gas carbon steel press systems
    Sold out

    Titan Press TPCP0012G 1/2 in. P x P Coupling, HNBR Gas, Carbon Steel

    Everflow Supplies
    $ 0.00 - $ 0.00
    $ 0.00
    $ 11.22
    $ 11.22 - $ 11.22
    $ 11.22

    Titan Press TPCP0012G 1/2 in. P x P Coupling Brand: Everflow Supplies | SKU: TPCP0012G Product Overview The Titan Press TPCP0012G is a carbon s...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 11.22
    $ 11.22 - $ 11.22
    $ 11.22
    Sold out
  • Titan Press TPCL0114G 1-1/4 inch no-stop coupling for HNBR gas carbon steel press systems
    Sold out

    Titan Press TPCL0114G 1-1/4 in. P x P No-Stop Coupling, HNBR Gas, Carbon Steel

    Everflow Supplies
    $ 0.00 - $ 0.00
    $ 0.00
    $ 27.85
    $ 27.85 - $ 27.85
    $ 27.85

    Titan Press TPCL0114G 1-1/4 in. P x P No-Stop Coupling Brand: Everflow Supplies | SKU: TPCL0114G Product Overview The Titan Press TPCL0114G is ...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 27.85
    $ 27.85 - $ 27.85
    $ 27.85
    Sold out
  • Titan Press TPCL0100G 1 inch no-stop coupling for HNBR gas carbon steel press systems
    Sold out

    Titan Press TPCL0100G 1 in. P x P No-Stop Coupling, HNBR Gas, Carbon Steel

    Everflow Supplies
    $ 0.00 - $ 0.00
    $ 0.00
    $ 21.53
    $ 21.53 - $ 21.53
    $ 21.53

    Titan Press TPCL0100G 1 in. P x P No-Stop Coupling Brand: Everflow Supplies | SKU: TPCL0100G Product Overview The Titan Press TPCL0100G is a ca...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 21.53
    $ 21.53 - $ 21.53
    $ 21.53
    Sold out
  • Titan Press TPCL0034G 3/4 inch no-stop coupling for HNBR gas carbon steel press systems
    Sold out

    Titan Press TPCL0034G 3/4 in. P x P No-Stop Coupling, HNBR Gas, Carbon Steel

    Everflow Supplies
    $ 0.00 - $ 0.00
    $ 0.00
    $ 15.59
    $ 15.59 - $ 15.59
    $ 15.59

    Titan Press TPCL0034G 3/4 in. P x P No-Stop Coupling Brand: Everflow Supplies | SKU: TPCL0034G Product Overview The Titan Press TPCL0034G is a ...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 15.59
    $ 15.59 - $ 15.59
    $ 15.59
    Sold out
  • Titan Press TPCL0012G 1/2 inch no-stop coupling for HNBR gas carbon steel press systems
    Sold out

    Titan Press TPCL0012G 1/2 in. P x P No-Stop Coupling, HNBR Gas, Carbon Steel

    Everflow Supplies
    $ 0.00 - $ 0.00
    $ 0.00
    $ 13.67
    $ 13.67 - $ 13.67
    $ 13.67

    Titan Press TPCL0012G 1/2 in. P x P No-Stop Coupling Brand: Everflow Supplies | SKU: TPCL0012G Product Overview The Titan Press TPCL0012G is a ...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 13.67
    $ 13.67 - $ 13.67
    $ 13.67
    Sold out
  • Home Flex 18-406-010 1 inch IPS underground yellow poly gas pipe 90-degree elbow

    Home Flex - 18-406-010 - 1" IPS Underground Yellow Poly Gas Pipe 90-Degree Elbow

    Home Flex
    $ 0.00 - $ 0.00
    $ 0.00
    $ 47.99
    $ 47.99 - $ 47.99
    $ 47.99

    HOME-FLEX 18-406-010 1-Inch IPS Underground Poly Gas Pipe 90-Degree Elbow Brand: HOME-FLEX | SKU: 18-406-010 Product Overview The HOME-FLEX 18-...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 47.99
    $ 47.99 - $ 47.99
    $ 47.99
  • Home Flex 18-401-005 1/2 inch IPS underground yellow poly gas pipe tee

    Home Flex - 18-401-005 - 1/2" IPS Underground Yellow Poly Gas Pipe Tee

    Home Flex
    $ 0.00 - $ 0.00
    $ 0.00
    $ 45.99
    $ 45.99 - $ 45.99
    $ 45.99

    HOME-FLEX 18-401-005 1/2-Inch IPS Underground Poly Gas Pipe Tee Brand: HOME-FLEX | SKU: 18-401-005 Product Overview The HOME-FLEX 18-401-005 is...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 45.99
    $ 45.99 - $ 45.99
    $ 45.99
  • Crown Industries GFS075F 5/8 inch flare x 3/4 inch FIP gas adapter
    Sold out

    Crown Industries GFS075F 5/8 in. Flare x 3/4 in. FIP Gas Adapter

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

    Crown Industries GFS075F 5/8 in. Flare x 3/4 in. FIP Gas Adapter Brand: Crown Industries | SKU: GFS075F Product Overview The Crown Industries G...

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    $ 2.55 - $ 2.55
    $ 2.55
    $ 2.55 - $ 2.55
    $ 2.55
    Sold out
  • Titan Press TPMA0034G 3/4 inch press x MPT male adapter for HNBR gas carbon steel systems
    Sold out

    Titan Press TPMA0034G 3/4 in. P x MPT Male Adapter, HNBR Gas, Carbon Steel

    Everflow Supplies
    $ 0.00 - $ 0.00
    $ 0.00
    $ 16.95
    $ 16.95 - $ 16.95
    $ 16.95

    Titan Press TPMA0034G 3/4 in. P x MPT Male Adapter Brand: Everflow Supplies | SKU: TPMA0034G Product Overview Carbon steel male adapter with HN...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 16.95
    $ 16.95 - $ 16.95
    $ 16.95
    Sold out

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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