Best Air Tank for Truck (2026): 5 Picks by Capacity and Pressure
5 onboard air tanks for trucks, from 2.5 to 5 gallons, compared by rated PSI, ports, material, mounting size and warranty.
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Top picks at a glance
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- 1
Best OverallVIAIR 91050 5 Gallon9.7/10View on Amazon - 2
Highest PSI RatingEVIL ENERGY 200 PSI9.6/10View on Amazon - 3
Best Kit ValueEVIL ENERGY 150 PSI9.6/10View on Amazon - 4
Biggest Aluminum TankZHSYMX 4 Gallon9.5/10View on Amazon - 5
Compact Aluminum PickZHSYMX 3 Gallon9.4/10View on Amazon
A truck air horn that fades during a long blast, or tires that need air far from a compressor, both point at the same missing piece: stored air on the truck. This guide compares the best air tank for truck use by capacity, rated pressure, ports, material and mounting size, so the tank you bolt on matches the job it has to do.
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Quick picks
- Best Overall VIAIR 91050 5 Gallon: 5 gallon steel tank, 150 PSI, two 3/8 in and two 1/4 in ports, one year warranty. Check price on Amazon
- Highest PSI Rating EVIL ENERGY 200 PSI: 200 PSI rating, 6 ports, kit with drain valve, hose, seal tape and hardware. Check price on Amazon
- Best Kit Value EVIL ENERGY 150 PSI: 150 PSI rating with 6 ports and the same complete kit, in a compact 2.5 gallon size. Check price on Amazon
- Biggest Aluminum Tank ZHSYMX 4 Gallon: 4 gallon aluminum tank with a 1/4 in thread for air ride and horn setups. Check price on Amazon
- Compact Aluminum Pick ZHSYMX 3 Gallon: 3 gallon aluminum tank, 5 ports, 1/4 in thread, for horns and onboard air. Check price on Amazon
Picks for the garage
VIAIR 91050 5 Gallon 4-Port Air Reservoir Tank
A 5 gallon steel air reservoir rated at 150 PSI with two 3/8 in ports and two 1/4 in ports, powder-coated for corrosion resistance.
Pros
- 5 gallon capacity, the largest tank here
- Two 3/8 in ports plus two 1/4 in ports
- 150 PSI maximum working pressure stated
- One year manufacturer defect warranty stated
Cons
- Dimensions differ between the bullets and the spec table
- Title calls the tank silver while the spec table lists black
- No drain valve, hose or mounting hardware listed
- Only 4 ports, fewer than the 6 on the EVIL ENERGY tanks
EVIL ENERGY 2.5 Gallon Air Tank Kit 6 Ports 1/4"
A 2.5 gallon steel air tank kit rated at 200 PSI with six 1/4 in NPT ports, a drain valve, hose, seal tape and mounting hardware.
Pros
- 200 PSI rating, the highest stated here
- Six 1/4 in NPT ports for flexible setup
- Complete kit: drain valve, hose, seal tape and mounting hardware
- Compact size at 19.61 by 7.87 by 6.30 in
Cons
- 2.5 gallon capacity, the smallest here
- No warranty term stated
- Needs weekly draining and professional installation per the listing
- No relief valve stated in the listing
EVIL ENERGY 2.5 Gallon Air Tank Kit 6 Ports 1/4"
A 2.5 gallon steel air tank kit rated at 150 PSI with six 1/4 in NPT ports, a drain valve, hose, seal tape and mounting hardware.
Pros
- Listed for air horns, suspension systems, tires and pneumatic tools
- Six 1/4 in NPT ports for flexible setup
- Complete kit: drain valve, hose, seal tape and mounting hardware
- Compact size at 19.61 by 7.87 by 6.30 in
Cons
- 2.5 gallon capacity, the smallest here
- Lower pressure rating than the 200 PSI version
- No warranty term stated
- No relief valve stated in the listing
ZHSYMX 4 Gallon (15 Liter)
A 4 gallon aluminum air storage tank with a 1/4 in thread, precision welded and anti-corrosion coated for air ride and horn setups.
Pros
- 4 gallon capacity, second largest here
- Aluminum body, light to carry and mount
- Precision welded with an anti-corrosion coating
- NPT 1/4 thread stated
Cons
- No PSI rating stated anywhere in the listing
- Spec table lists 3, 4 and 5 gallon sizes against a 4 gallon title
- No dimensions or weight stated
- No warranty term stated
ZHSYMX 3 Gallon (12 Liter)5 Ports compressed air
A 3 gallon aluminum air storage tank with five ports and a 1/4 in thread, precision welded and anti-corrosion coated for air ride and horn setups.
Pros
- Five ports with a 1/4 in NPT thread
- Aluminum body, lightweight and portable per the listing
- Precision welded with an anti-corrosion coating
- 3 gallon size, the smallest aluminum tank here
Cons
- No PSI rating stated anywhere in the listing
- Spec table lists 3, 4 and 5 gallon sizes against a 3 gallon title
- No dimensions or weight stated
- No warranty term stated
Compared on paper
| Model | Shop Score | Capacity | Rated PSI | Ports | Material | Mounting size | Warranty |
|---|---|---|---|---|---|---|---|
| VIAIR 91050 5 Gallon | 9.7/10 | 5 gallon | 150 | 4 | Steel | 20.5 x 9 x 10.5 in | One year |
| EVIL ENERGY 200 PSI | 9.6/10 | 2.5 gallon | 200 | 6 | Steel | 19.61 x 7.87 x 6.30 in | Not stated |
| EVIL ENERGY 150 PSI | 9.6/10 | 2.5 gallon | 150 | 6 | Steel | 19.61 x 7.87 x 6.30 in | Not stated |
| ZHSYMX 4 Gallon | 9.5/10 | 4 gallon | Not stated | Not stated | Aluminum | Not stated | Not stated |
| ZHSYMX 3 Gallon | 9.4/10 | 3 gallon | Not stated | 5 | Aluminum | Not stated | Not stated |
Specifications are manufacturer rated, as published on each listing and collected 8 November 2026.
How the points were given
Each tank is scored on performance, build, value, safety and warranty, with the weights published on our How We Pick page. No listing here states an ASME tank rating or a relief valve, so safety sits at zero across the picks, and the VIAIR listing is the only one that states a warranty term.
| Product | Shop Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| VIAIR 91050 5 Gallon | 9.7 | 32 | 22 | 21 | n/a | 0 |
| EVIL ENERGY 200 PSI | 9.6 | 30 | 21 | 21 | n/a | 0 |
| EVIL ENERGY 150 PSI | 9.6 | 29 | 21 | 20 | n/a | 0 |
| ZHSYMX 4 Gallon | 9.5 | 27 | 19 | 19 | n/a | 0 |
| ZHSYMX 3 Gallon | 9.4 | 26 | 19 | 18 | n/a | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score. Safety counts only for powered gear or where the listing states safety features; where it does not apply, the score is taken over the remaining 90 points.
What the listings tell you
We read 5 air tank listings. Capacities run from 2.5 to 5 gallons, and 2 listings state a pressure rating: 150 PSI on the VIAIR and the smaller EVIL ENERGY tank, and 200 PSI on the other EVIL ENERGY tank. The ZHSYMX listings state no PSI rating at all, and only the VIAIR listing states a warranty term. The ZHSYMX spec lines list 3, 4 and 5 gallon sizes against their titles, and the VIAIR bullets and spec table give different dimensions and different colors.
Buying guide: the best air tank for truck use
Capacity
The 5 tanks here hold 2.5, 3, 4 or 5 gallons. A bigger tank holds more air for long horn blasts and air ride cycles, while a 2.5 gallon tank fits tighter spots and still feeds a horn or a tire top-up. Pick the capacity your mounting space allows, then check the pressure rating.
Rated pressure
Two tanks state a 150 PSI rating and one states 200 PSI. Match the rating to your compressor and to the tools the tank will feed, and never feed a tank from a compressor set above the tank rating. The ZHSYMX tanks state no rating, so their pressure limit is unknown from the listing.
Ports
Port counts here run from 4 to 6: the VIAIR tank has two 3/8 in ports and two 1/4 in ports, the EVIL ENERGY tanks have six 1/4 in ports each, and the 3 gallon ZHSYMX tank has 5 ports. Count the lines you need, one for the compressor feed, one for the horn or tool, and one for the drain, before you pick a tank.
Material and mounting
3 tanks here are steel and 2 are aluminum. Steel tanks carry an anti-corrosion coating or a powder coat, and the aluminum tanks are described as lightweight. Measure the mounting space against the stated dimensions, 19.61 by 7.87 by 6.30 in on the EVIL ENERGY tanks and 20.5 by 9 by 10.5 in on the VIAIR, and confirm the size and mounting location before ordering.
Drain and upkeep
The EVIL ENERGY listing says to drain the tank weekly to keep it in top condition. The kit includes a drain valve, so the job is quick, and the same listing says to use professional installation for reliable performance.
For the air side of the setup, see our best truck mounted air compressor and our best air compressor for truck bed.
Drain the tank after use so water does not rust it from the inside, never exceed the tool's rated pressure, wear eye protection, and run 240V units on the circuit the manual calls for. Do not run a gas engine compressor in a closed garage. Read our Safety Disclaimer.
Garage Fit Check
- Measure the mounting space first: 19.61 by 7.87 by 6.30 in on the EVIL ENERGY tanks, 20.5 by 9 by 10.5 in on the VIAIR, and no dimensions stated on the ZHSYMX tanks.
- Check the port threads: 1/4 in NPT on the EVIL ENERGY and ZHSYMX tanks, plus 3/8 in ports on the VIAIR.
- Plan for weekly draining: the EVIL ENERGY listing says to drain weekly, and its kit includes a drain valve.
- Confirm size and mounting location before ordering, and use professional installation per the EVIL ENERGY listing.
FAQ: garage tools
What is an air storage tank for a truck?
It is a tank that stores compressed air on the truck for air horns, air ride suspension and inflating tires. The 5 tanks here hold 2.5, 3, 4 or 5 gallons and mount onboard, fed by a compressor.
How do you use a portable air tank?
Fill it from a compressor and connect it to the horn, tool or tire it feeds. The EVIL ENERGY kit includes a drain valve, hose, seal tape and mounting hardware for the setup, and the listing says to drain the tank weekly.
What size air tank fits a truck?
It depends on the mounting space and the job: the tanks here run from 2.5 to 5 gallons, with the EVIL ENERGY tanks at 19.61 by 7.87 by 6.30 in and the VIAIR at 20.5 by 9 by 10.5 in. Measure the space on the truck and confirm the size and mounting location before ordering.
How often should you drain an air tank?
The EVIL ENERGY listing says to drain it weekly to keep the tank in top condition. Its kit includes a drain valve for the job.
Related: the best air tank for cars, the tankless vs tank air compressor guide, the best air compressor kit for car tires and our air compressors hub. Also see our best 12V air compressor for road trips and our how to choose an air compressor.
