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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: $7.59
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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.
  • All Info
  • Reviews (504)
  • 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   (504 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!


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


Everything came as shipped and came fast. Parts are high quality and fit as specified. All (4) of the 1-1/2 screws were too short and barely reached through the lower brackets (another 1/4" would be nice). Combined with the fact that there were also several things in the way when trying to put the nuts on to mount the lower bracket (2022 Silverado LTD) it turned the job into a much longer job. Success however was achieved. Haven't tested it with a load yet but when I aired them up to test for leaks it lifted the tail a lot.


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.


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


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.


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 know who I will be calling next order,Thanks Joshua


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.


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.


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


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


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.


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.


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.


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


Better fitting than the plastic T that comes with kit.


Fit great, both the original air lines and the new replacement.


Tee simplifies air line plumbing. Easy installation and leak free


So far, all is good. I'm getting the rise I'm looking for and a good ride. I'm happy with the product.


This fitting is great for hooking both airbags up to one fill fitting.


just getting done putting my 5000 Justable air springs put them on about three hours I didn’t have any left I did them on the ground so that’s not too bad I’m gonna be sending some pictures along with us so thanks very much and I hope they work


The fitting made it a breeze to equally inflate air bags!
Item as described and was easy to install.



Fitting working as designed. No leaks noticed. Nice to have single air fitting for the system.

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Employee Dustin K
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