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Air Lift Union Tee for 1/4" Air Lines

Air Lift Union Tee for 1/4" Air Lines

Item # AL21838
Our Price: $8.05
Accessories and Parts
Shipping Weight: 0.05 lbs
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Adapter splits one incoming air line into two outgoing lines or routes two incoming air lines into one outgoing line. 1-800-940-8924 to order Air Lift accessories and parts part number AL21838 or order online at Free expert support on all Air Lift products. Great prices and Fastest Shipping for Air Lift Union Tee for 1/4" Air Lines. Accessories and Parts reviews from real customers.
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  • Reviews (538)
  • Q & A (0)
  • Videos (2)
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Air Lift Accessories and Parts - AL21838

  • Air Suspension Compressor Kit
  • Vehicle Suspension
  • Connectors
  • Union Tee
  • Air Lift
  • 1/4 Inch Tubing

Adapter splits one incoming air line into two outgoing lines or routes two incoming air lines into one outgoing line.


  • Provides fast and easy air line connection
  • Splits 1 incoming line into 2 outgoing lines
  • Routes 2 incoming lines into 1 outgoing line
  • Fits 1/4" plastic air lines
    • Will not work on braided steel air lines

21838 Air Lift Union T-Connector for 1/4" Plastic Tubing

California residents: click here

Video of Air Lift Union Tee for 1/4" Air Lines

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Air Lift Union T-Piece Review

Today we're gonna be taking a look at Air Lift's Union T-piece for quarter-inch air lines. And there are two main reasons you may want this unit when installing airbags. You can use it when installing a compressor to tee off and give yourself a manual inflation valve or like we're using it here on this truck to take the left and right side airbags and bring them into one so we can fILL them up simultaneously.We've got ours installed here so our inflation valve is coming out the center of the tee and the two coming off the sides go to both our left and our right side airbags. You may prefer this setup if you just want to quickly air up your airbags simultaneously. Now, you are going to lose the ability to air the up independently from side to side. That's gonna be important if you're trying to adjust for uneven loads.

You may want them to be different on one or the other. But if you're not really using it for uneven load purposes, this is going to make airing them up and deflating them much quicker if you're constantly hooking up and removing the same trailer over and over that doesn't need left and right load leveling.On our Air Lift compressor systems, it already comes with one T-fitting to allow it to air out both bags simultaneously, but if you want to add a manual inflation valve to it, you'll need a second T-fitting here. This can be installed anywhere between your air compressor and airbags in line on any of these quarter-inch airline hoses that's gonna be run. You just simply place it in between and have the center one go out to your manual inflation valve.Now, we'll show you how you connect and disconnect airlines form this fitting. It's a click-connect fitting, so you simply just push them in.

But to release them, the end here actually slides inward, and I'm using a eight millimeter wrench to do this. You just need something that'll push in on both sides. So, it pushes that in evenly and that'll allow it to release, and the hose just simply slides out. To put it in, you simply just push it in. And I like to kind of push it in and pull out a few times to make sure it's fully seated.

And as you can see here, if I'm not pressing in on that collar there at the end, I cannot pull this out. It automatically locks itself in place. And that completes our look at Air Lift's Union T-piece for quarter-inch airlines.

Customer Satisfaction Score:

Customer Reviews

Air Lift Union Tee for 1/4" Air Lines - AL21838

Average Customer Rating:  4.8 out of 5 stars   (538 Customer Reviews)

Adapter splits one incoming air line into two outgoing lines or routes two incoming air lines into one outgoing line.


Product seems to work well so far. All parts and hardware were there in box which is always a plus. Only issue I had was, the left side upper bracket was a pain between the lines running down the frame and the Goosenck hitch. It said it worked with Gooseneck Hitch....but not that easy. I have a B&W gooseneck hitch already on my 2016 F250. It worked, but without removing the hitch and starting over with air bags first, getting the nut on the upper left mount was a pain because it has to go between the frame and the side plate for the hitch (no hole in side plate and about 1/2 -3/4 inch clearance for nut to go in on bolt near top of frame rail. Kindof same issue on right side, didnt use the 3/4" treaded frame insert that came with it, I just used a longer bolt and ran through both the mounting bracket, frame , and side plate for hitch, still using the spacer that came with hitch that had to be used between the frame and the hitch side plate. You can figure it out, just more of a pain than thought it would be. Will say their air fittings seem high quality and the send plenty of airline hose. The issues with the system installation with a gooseneck hitch in is the only reason I didnt give it 5 stars.


The air lift union tee is working good now for 4 days since being installed on my 2012 Honda Odyssey! No complaints here!


It arrived earlier than expected. I opened the box and all looks good. The quality of the system looks very good. I'm happy I ordered the "T" it will make installation earsier and more secure. Thank you Etrailer


Thank you Quinn for all the help. I did in fact install the Schroeder valve in the fuel cap , and it works great! The bags installed in about an hour , and all worked great , thanks again! Rhett


Great costumer service. Easy install. Levels out the pickup and rides perfectly. Chevy Silverado 3.0 Duramax. Airstream 35’ 6500 lbs.


This kit was excellent. It dramatically increased the safety and stability while towing a heavier trailer. Follow the instructions carefully. I had a muffler blow a hole out and "cook" one of the bags which caused a leak. Not the products fault, so I bought a replacement bag at a dealer while out on the road and was able to get going quickly. If used as intended and protected as instructed, this kit will serve you very well.


Package was open in the box but all the parts were in the box.


Upon unboxing, I'm highly satisfied. Looking forward to installing. Will follow up once complete. I had to call etrailer because the box was damaged and there were 3 parts missing from the box. I'm blaming the shipping company. Following my call with etrailer, the Rep made it right and got the missing parts in the mail the same day. I can say, etrailer makes everything right. Great service and I highly recommend etrailer to everyone.


Very quick delivery. Installation instructions are very detailed and looks like a quality product. Well done.


Worked great. Used the tee to tie the two bags together air wise. Put this on my niece’s 2017 tundra and would never see a load that was not evenly distributed so connected the two bags to make it easier for her.


Website and Live Chat told me these would work on my new truck. Videos showed easy installation. They would not fit without drilling the frame, something not included in instructions or videos. Bottom-line, not a fit per statements, instructions, videos. Had to pay a restocking fee to send them back. Have purchased other items in the past, very happy but have not purchased anything since the hassle a year ago with these springs. To be clear - the air springs looked great and well built. Imagine they would do the job. My issue is with the error of published statements and advice from Live Chat that they were a match to my truck. The error cost me $$$
I shared photos a year ago with customer service, deleted since.


I have never been disappointed with Great prices, quality products, and fast shipping...


Cannot be beat for the value and performance-
a 7K lb boat with Independent suspension on the Toyota Sequoiq, this eliminated the sag and actually rides better inflated even without the trailer weight. Installation is easy and straight forward. Jack the vehicle up and use zip ties to make the bags smaller and tighter to slide inbetween the springs, then cut ties!


The air bag kit was easy to install, works great, but it was missing four - 3/8" nuts. The air bags tremendously improved the ride when pulling our RV. It all went together with the hitch we bought from etrailers a couple of years ago. Service is great and the people follow up. You all are our go-to company for truck and trailer parts.


I know who I will be calling next order,Thanks Joshua


Works great when you want both sides same pressure.



still working great every time I hook on to the RV and makes the ride much better


The kit works well, the airlines/fittings are very easy to use. The directions could have been more clear, particularly emphasizing how challenging it would be to get the airbags into the coil springs. I was sure I had the wrong size for a while, but after double checking, I found it easier to take the coil springs out of the car for easier access. In the end the install and performance are a success.


As soon as I put it to the test I will let y’all know

Install was great,few minor adjustments
Overall install was good


I love that i only have to use one port to inflate my air bags


Really like the air bags and acc. Ni more sway or bounce


The union tee has held up well for over 9,000 miles and 12 months of mostly highway driving. I made several heavy cargo loads to the coast with 25 lbs. of air pressure and had no issues.


It went together well. Would have been better if I had enough Jack power, but that’s on me not the airlift. Directions were spot on. Your service was the best, had it in a couple of days of ordering it. Thank you.


Purchased this along with my air lift system, made it very simple to adjust the pressure with a single port.



Works as described, easy to install and makes it simple to adjust both sides at the same time.


Always the rite stuff from etrailer, Thank you


Very easy to use and it did not leak much better that the plastic one that comes with the air bags.

Bobby S.


They are holding pressure just fine easy to install

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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Dustin K
Video by:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee David F
Installed by:
David F
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Noah M
Updated by:
Noah M

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