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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: $8.45
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Shipping Weight: 0.06 lbs
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Air Lift Union Tee for 1/4" Air Lines 1/4 Inch Tubing AL21838
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Adapter splits one incoming air line into two outgoing lines or routes two incoming air lines into one outgoing line. 1-833-496-1390 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 (357)
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  • 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 Tee 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   (357 Customer Reviews)

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


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 am very pleased with the union T and the load lifter kit ,when the compressure and wireless controller arrive ,at that time ,I will have it installed and get some pictures ,till then THANKS .

have had air lift kit and wireless copressure on truck with truck bed camper and the truck drives better front end brakeing is improved ie brake dust is mimial,truck is level and head lites are on road,driving experiance is a greatly improved,glad i chose to install kit .
Paul J - 11/17/2022


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.


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


I attempted multiple times to contact the company with pictures showing that I received someone’s returned order. Bags were taped shut and the parts had previous instillation marks on them. Also some parts were broke and I had to purchase parts at a local hardware store. It’s a nice produce but should not have to pay full price for used parts and some broken. Displeased the etrailer customer service

I am sorry to hear we ped the ball and left you hanging like that! I have sent your information to our team and they will be reaching back out to you in the near future. Thanks for reaching back out!
-- Etrailer Expert Brooke M - 09/02/2022


I first purchased the Air Lift LoadLifter in an attempt to help reduce trailer sway and handling of my truck when towing my travel trailer. The far exceeded my expectations. Having the ability to get both my truck and my trailer completely level has made an enormous difference in towing. These air bags are not designed to reduce trailer sway, but being able to tow with everything level and having anti-sway mechanism is the perfect pair. I only wished I had found them earlier and there would be been several less "white knuckle" driving experiences.


Easy to use, no leaks. Allowed me to combine the lines to both air bags, since differential inflation was not a consideration for me. I was strictly interested in the bags to deal with the squat while towing my camper, not unbalanced loads.


First, I can’t say enough about etrailer and Amy E. and all her help. I will be happy to highly recommend etrailer to all of my camping friends and people I meet at the campground. They were extremely helpful and very diligent in keeping me informed of my order status.

The airlift load lifter 5000 has performed fantastic. I got home Thursday evening from work and started the installation project. I did the process in my driveway in 2 1/2 hours. The instructions were very clear and easy to follow. If you have the capability I recommend lifting the whole back end of the truck and removing the rear wheels for installation. I was able to work over the rotor while kneeling instead of laying underneath the truck the entire time. I also purchased the airlift union tee and put a single Schrader valve in my bumper.
I left the next afternoon for a weekend of camping and was happy to see my truck sitting level while being hooked up to the camper.
Thank you again Amy E and etrailer


Air Lift air springs are good and dependable, use them for the last 25 years on three pick-ups always worked great. My complaint would be against the lousy packaging which came with two or three holes and all messed up, luckily all that was missing was one washer.


Works great when you want both sides same pressure.


Easy to install. Took about 4 hours. Works great hauling trailer is more confident and comfortable. Also use when hauling dirt or other heavy loads. Very happy


USPS didn't scan item but it was shipped on time and delivered. etrailer responded very quickly and often to ensure package delivery.


Everything fit per instructions no leaks on first attempt really like the wireless remote


Quick easy install, clear instructions great product , performs good very nice addition to the truck


Had the Firestone helper bags on my truck for over a year now and they are great no complaints


Product functioned we’ll. It should have been included in air springs order.


Fast delivery, fantastic follow up


Great stuff. I put this on my 2022 Ram 1500 with only a little bit of elbow grease. They work well and am really happy so far with their performance.


Exactly matched the other tees that came in my Air Lift kit. Solid component.


Just got the order today. Looks as though the box received some rough by UPS during shipment but it looks like everything is there. T was placed in the box, not wrapped or protected. I will start on trying to put it together tomorrow.
Thanks etrailer!!


Works great. Used in air lift system and never drops pressure. Just have to be sure tubing is firmly seated during install

Awesome product. Maintains system pressure in all conditions
John - 03/27/2022


I wish I had ordered this when I ordered my Air Lift kit, but I didn’t. So I had to pay for shipping, but it arrived very quickly and I’ll be installing it today.

The “T” connection is still working as it should. No leaks, and it’s so nice to be able to fill both Air Lift bags at the same time as well as deflating them together.
David - 01/16/2022


When ever I have called and talked to a few people they have been very knowledgeable and courteous. I was putting together something that was not right off shelf we did geter down. Thank You to all that helped.


I ordered the fire stone airbags. They made it very easy to get the correct parts first time and they were delivered on time. Very friendly.


Very good customer service. Helpful videos on line showed me how to do the installation on my own.

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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:
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Employee Noah M
Updated by:
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