Grill Patrol
Gas grill repair

How to replace gas grill burner tubes (step by step).

When a burner tube rusts through at the ports, weak or uneven flame is the result and cleaning will not fix it. Replacing a burner tube is a one-tool job that takes about 45 minutes. The critical steps are measuring the tube correctly before ordering and running a gas leak test before the first cook.

Start: do I need a replacement? Jump to replacement tubes
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2 primary safety sources cited: the CPSC recall and the AMA

Our safety claims cite primary sources (CPSC, AMA). Picks are cross-checked against the 2026 CPSC wire-bristle recall. Live prices and ratings stay on Amazon, where they’re always current.

Gas work requires a leak test before you cook

Any time you disconnect or replace a burner tube, run a soapy water leak test on every gas connection before lighting the grill. This is shown in Step 6 below. Do not skip it.

Jump to a step

Diagnose Disassemble Remove old tube Measure Install Leak test Replacement tubes

Clean ports first. If that fails and you find rust holes, a tube replacement takes about 45 minutes with one screwdriver. Always run a leak test before the first cook.

Time
About 45 minutes
Tools
Phillips screwdriver, soapy water
Skill
Beginner-friendly
Critical step
Match the tube before ordering
  1. 1 Clean ports first, confirm replacement is needed
  2. 2 Disconnect gas and remove grates and flavorizer bars
  3. 3 Unscrew and slide out the old tube
  4. 4 Measure length, inlet diameter, and port pattern
  5. 5 Install the new tube, seat inlet over the orifice first
  6. 6 Reassemble and run a soapy water leak test

First: clean the ports and venturi tube, then decide

A weak or uneven flame can come from clogged ports or a blocked venturi tube, not just a corroded tube. Cleaning costs nothing and often fixes the problem. Try this before ordering parts.

Flame is yellow, lazy, or barely covers the grateRusted ports or blocked venturi tube
Flame is uneven across the burner lengthClogged or corroded ports along one section
Visible rust holes in the tubeReplace the tube
Flame lights but goes out near the centerBlocked ports in the middle section, or rust holes
Cleaned ports, still weak after cleaningTube corroded through, replacement needed

If you cleaned the ports and cleared the venturi tube and the flame is still weak or uneven, and you can see rust holes in the tube when you inspect it, that tube needs replacing. Proceed to Step 2.

The replacement, step by step

Disconnect gas and disassemble the cooking area

Everything comes out to give you clear access to the tubes.

Deep dive

Turn all burner knobs to off. Close the propane tank valve by turning it clockwise until snug. Disconnect the regulator from the tank by unscrewing the fitting counterclockwise.

Lift out the cooking grates and set them aside. Then lift out the flavorizer bars. The burner tubes are now visible and accessible. Take a photo before removing anything so you have a reference for reassembly.

Remove the old burner tube

One or two screws hold it in place; the other end slides over the valve.

Deep dive

Look at the back (or side) of the cookbox where the burner attaches. There is usually one Phillips-head retaining screw that holds the rear end of the tube in place. Remove it.

The front end of the tube has a flared inlet that slides over the gas valve orifice. Once the retaining screw is out, slide the tube backward to clear the orifice, then lift it up and out. Some grills have a small clip or bracket at the front as well. Check for that before forcing the tube backward.

Set the old tube aside and do not throw it away yet. You will use it to check measurements against the replacement before installing.

Measure the old tube and match the replacement

Three numbers determine the right tube. Get them wrong and the flame will be wrong.

Deep dive

Measure the old tube in three places:

  • Overall length: end to end, in inches.
  • Inlet orifice inner diameter: the inside diameter of the flared end that slides over the valve. This must match the valve orifice or the tube will not seal properly.
  • Port pattern: note whether ports run along the top only, or along the top and sides. The pattern controls how heat spreads across the cooking area.

Compare these measurements to the replacement tube before installing. A tube that is one inch shorter or longer than the original may not seat properly or may create dead spots in the flame. Do not guess or assume a tube is close enough.

Install the new tube

Inlet end goes onto the valve orifice first, then seat the tube and reinstall the screw.

Deep dive

Hold the new tube with the inlet end (the flared end) facing the valve orifice. Lower the inlet end onto the orifice first, then push the tube forward so the inlet is fully seated. The tube should sit flat without rocking.

Align the rear hole with the retaining screw mount and install the screw. Snug it firmly but do not overtighten, the screw just needs to hold the tube from shifting sideways. Check that the tube sits at the same height as the other tubes (on multi-burner grills).

Reassemble and run the gas leak test

This step is not optional after any gas-line work.

Deep dive

Replace the flavorizer bars and cooking grates. Reconnect the regulator to the tank and hand-tighten. Open the propane valve slowly, over about three to four seconds.

Mix a few drops of dish soap into a small bowl of water. With the burner knobs still OFF, brush the soapy water onto every gas connection: the regulator fitting at the tank, the regulator hose fitting at the manifold, and the inlet end of each new tube. Watch each connection for 30 seconds.

Bubbles mean a gas leak at that connection. Stop, close the tank valve, tighten the connection, and re-test. No bubbles on any connection means you are clear to light. Turn one burner knob to the light position and ignite normally.

Heads up: The product links on this site are affiliate links. If you buy through them, Grill Patrol may earn a small commission at no extra cost to you. We only point to gear we’d put on our own grill. Disclosure.

Replacement tubes: the verified Weber Spirit picks

Burner tubes are model-specific. The two picks below are verified for specific Weber Spirit models. If your grill is not listed, use the search link at the bottom and confirm measurements before ordering.

Have a different grill model? Use this tag-attributed search and filter by your grill brand and length: replacement gas grill burner tubes on Amazon →. Measure your old tube before ordering.

Need to clean rather than replace?

If the ports are clogged rather than corroded through, a venturi tube brush clears spider nests and debris without a parts order. See venturi brushes on Amazon →

Or read the full cleaning guide first: how to clean grill burner tubes.

What else we verify

No brand pays us to feature a part here. Every pick is a current Amazon listing we check for correct fitment and stock, with a real track record of buyer reviews rather than a brand we have not seen hold up.

FAQ

How do I know if I need to replace the burner tube or just clean it?

Start by cleaning. With the grill off and cool, clear every port with a stiff wire and flush the venturi tube with a brush. If the flame is still uneven or weak after cleaning, inspect the tube for rust holes. Any visible hole means the tube is corroded through and cleaning will not fix it. Replace it at that point.

How do I measure a burner tube to find the right replacement?

Measure the overall length from one end to the other, and measure the inside diameter of the gas-inlet orifice (the end that slides over the valve). Also note the port pattern (whether ports run along the top only, or along the top and sides). These three measurements are what you need to match before ordering a replacement.

Can I use a universal burner tube?

Universal tubes are not always a true fit. A tube that is too short or long will not seat properly over the valve orifice, and a tube with the wrong port pattern will not produce an even flame. Model-specific tubes are worth the extra searching. If you can only find universal, measure carefully and verify that the inlet orifice matches before installing.

Do I need to replace all three tubes at once on a 3-burner grill?

Only if all three are corroded. If one tube is clearly worse than the others, replace just that one. But if the grill is old and one tube has rust holes, the others are likely close behind. Replacing all three at once saves a second disassembly job a year from now.

How long does a burner tube replacement take?

About 30 to 45 minutes for someone doing it for the first time. The disassembly (removing grates and flavorizer bars) takes most of that time. The tube swap itself is a few minutes once you have clear access.

What is the gas leak test I need to do after replacing a tube?

Mix a few drops of dish soap into a small bowl of water. With the grill reassembled and the propane tank open (burners OFF), brush the soapy water onto every gas connection: the regulator fitting, the valve fittings, and the inlet end of each new burner tube. Watch for 30 seconds. Bubbles mean a leak at that connection. No bubbles means you are clear to light. Never skip this step after any gas-line work.

Is this a job I can do myself, or do I need a professional?

Most homeowners can do this job themselves. The tools required are basic (usually just a Phillips screwdriver), the gas lines are not cut or modified, and the safety check (soapy water leak test) is straightforward. If you smell gas after the leak test, stop and call a professional.

Related guides

Doing a full restore while the grill is apart?

Grab the free restore checklist. It covers the full order of operations from grates to gas connections. No email required. Get the free checklist.