Technical Foundation
What Is a Gas Connector Fitting?
A gas connector fitting is a flexible, corrugated stainless steel hose assembly with fixed end fittings (flare, NPT thread, or quick-disconnect) that provides the final, flexible connection between a rigid gas supply line and an appliance, allowing for installation tolerance and appliance movement (such as pulling a range out for cleaning) without stressing rigid pipe joints. Connectors are sized by nominal pipe diameter matched to the appliance's gas inlet and the required BTU/hour flow rate.
Connectors are rated for a maximum length beyond which pressure drop becomes significant at the appliance's rated BTU input, and commercial kitchen applications using movable equipment require an approved restraint (a secondary cable or chain) limiting how far the connector can stretch, preventing it from being pulled to failure. Never reuse a gas connector when relocating or replacing an appliance — most codes require a new connector at each installation because the flexible corrugations are vulnerable to fatigue cracking from repeated flexing.
Prefer a quick quote?
Get Gas Connector Fitting Pricing in Your Inbox
Skip the search — tell us the pipe size, connection type and required length and we will come back with pricing.
| Spec | What It Means | Why It Matters |
|---|---|---|
| Pipe Size | 3/8in, 1/2in, 3/4in, 1in nominal | Must match appliance inlet size and be adequate for the appliance's BTU/hour rating without excess pressure drop |
| Connection Type | Flare fitting, NPT thread, quick-disconnect | Must match both the supply line stub-out and the appliance's gas inlet fitting |
| Maximum Length | Manufacturer-rated max length per diameter | Excess length increases pressure drop, potentially starving high-BTU appliances |
| Certification | CSA/ANSI Z21.24 listed | Required for code-compliant appliance gas connections in most jurisdictions |
| Restraint Requirement | Required for movable commercial equipment | Prevents the connector being over-extended and damaged when equipment is pulled out for cleaning/service |
Shop Gas Connector Fitting
Browse Gas Connector Fitting Sub-Categories
Organised by connector application. Pick a sub-category, or describe your appliance and gas type and let ChatMRO match the fitting.
How it works
From Half-Remembered Part Number to PO, in Three Steps.
Ask
Type an MPN, paste a spec sheet, or describe the part in plain English. ChatMRO understands engineer-speak.
Compare
Side-by-side specs, cross-references, and equivalents from multiple sources — without the clutter of endless browser tabs.
Quote & Buy
Request a quote or add to cart. Volume discounts, VAT-aware pricing, and consolidated procurement — all in one place.
Applications
Where Gas Connector Fitting Get Used
Gas connector fittings are specified anywhere a gas appliance needs a flexible, code-compliant connection between its inlet and a fixed supply line.
Residential Kitchen & Laundry Installation
Flexible connectors linking gas ranges, dryers and water heaters to fixed supply lines with installation tolerance.
Commercial Foodservice Kitchens
Restrained gas hose assemblies connecting movable cooking equipment that must be pulled out for cleaning.
HVAC Equipment Installation
Gas connectors linking furnaces and rooftop units to building gas supply during installation and service.
Property Management & Facilities Maintenance
Code-compliant replacement connectors installed whenever a gas appliance is replaced or relocated.
Mobile & Modular Food Service
Quick-disconnect gas fittings enabling fast, tool-free connection and disconnection of portable cooking equipment.
New Construction & Remodeling
Appliance gas connectors sized and installed as part of final gas appliance hookups.
FAQ
Gas Connector Fitting Questions, Answered
Can I reuse a gas connector when installing a new appliance?
No — most plumbing and gas codes require a new connector at each appliance installation, because the flexible corrugated section is vulnerable to fatigue cracking from repeated flexing and bending during the original installation and any subsequent movement. Reusing a connector risks an undetected crack leading to a gas leak.
How do I size a gas connector for my appliance?
Match the connector's pipe diameter to the appliance's gas inlet fitting size, and confirm the connector's rated capacity meets the appliance's BTU/hour input at the length you need — longer connectors have more pressure drop, so a connector adequate at 24 inches may be undersized for the same appliance at 60 inches.
Why do commercial kitchens require a restraint on gas connectors for movable equipment?
Movable cooking equipment is regularly pulled out from the wall for cleaning, and without a restraint (a secondary cable or chain limiting travel), the equipment can be pulled far enough to stress and eventually rupture the flexible gas connector. Most commercial kitchen codes require an approved restraint device on any gas connector serving movable equipment.
What's the difference between a flare fitting and NPT-threaded gas connector?
A flare fitting seals via a metal-to-metal cone seat compressed by a flare nut, commonly used on appliance-side connections and easier to disconnect for service. NPT (National Pipe Thread) fittings seal via tapered threads, often with thread sealant or tape, and are more common on the rigid supply-line side of the connection.
Do gas connectors need to be certified, and what should I look for?
Yes — look for CSA or ANSI Z21.24 listing, which confirms the connector has been tested for gas-tightness, flexibility and durability under the standard's requirements. Uncertified connectors may not meet code and can pose a leak risk that a listed connector is specifically tested against.
Keep browsing
Related Categories
Explore More
- Electric Hand and Die Grinders
- HID Lamps and Bulbs
- Dust Collector Accessories
- Colony Counters
- Planes and Shaving Tools
- Brake Drum Dolly
- Prewired Raceways
- Sprinkler Wire and Irrigation Cable
- Non Hazardous and Hazardous Waste Labels
- Battery and Cable Connectors
- Soil Tester Accessories
- Belt Drive Centrifugal In-Line Blowers
Find Your Next Part Now.
Describe a part number, spec or what it does.