When selecting an air tank for a trailer, the focus is on durability, capacity, and compatibility with your onboard air system. The top picks below are best for different trailer setups: long-haul trailers needing steady air supply, light-to-medium duty trailers needing compact tanks, and heavy-duty applications requiring robust aluminum or steel units. Each option is evaluated for ease of integration, reliability, and practical limits. The table below highlights core specs to help you compare at a glance.
| Product | Capacity | Material | Best For | Notes |
|---|---|---|---|---|
| Great Dane Trailers Genuine Air Tank – HOS1205 | 32.15 lb package | Steel (Genuine Great Dane) | Heavy-duty trailer air system upgrades | OEM-grade, straightforward replacement |
| CNRAQR 5 Gallon Air Tank | 5 gal (18 L) | Aluminum | Versatile onboard air, car horns, suspension | Balanced capacity and weight |
| CNRAQR 1.6 Gallon Air Tank Aluminum | 1.6 gal (~6 L) | Aluminum | Compact systems and space-limited trailers | High-pressure capable |
| ARB 4 Litre Aluminium Tank | ~4 L | Aluminium | Onboard installs where weight matters | Lightweight and mountable horizontally or vertically |
| EVIL ENERGY 1.5 Gallon Tank Kit | 1.5 gal | Steel (with coating) | Complete kit for quick setup | Includes compressor and fittings for quick install |
Great Dane Trailers Genuine Air Tank
The Great Dane Genuine Air Tank is a factory-grade option designed for heavy trailer systems. Best for buyers seeking OEM compatibility and straightforward replacement parts. The item package weight is 32.15 pounds, and the package quantity is one. This tank is suited for maintenance or upgrades on large trailers that rely on a robust air supply. Caution: confirm fitment with your trailer model before purchase, as OEM variants vary by fleet configuration.
Belgrade Hoosier Air Tank HOS1242 12″ Dia, 2 Port
The Belgrade Hoosier Air Tank presents a sturdy steel construction with a sleek protective paint finish. It includes a pressure switch to control automatic valve operation, making it suitable for trailers needing a reliable, low-maintenance air reservoir. Best for users prioritizing long-term durability and corrosion resistance. Limitation: steel tanks may require periodic inspection for corrosion in harsh environments.
CNRAQR 5 Gallon Air Tank
The CNRAQR 5-gallon aluminum air tank offers versatile applications for trailers and onboard air systems. Its aluminum construction provides durability with light weight, favorable for trailers where weight is a concern. Best for expanding air capacity without adding excessive weight. Caution: ensure compatibility with your existing plumbing and fittings, as 1/4 NPT connections are common but fitment varies.
CNRAQR 1.6 Gallon Aluminum Tank
This CNRAQR 1.6-gallon aluminum tank is ideal for compact trailer setups needing high-pressure capability. The aluminum body ensures corrosion resistance and lighter weight compared to steel equivalents. Best for small-to-medium trailers, or as a spare capacity option. Choose this if space is limited and you need reliable high-pressure operation. Limitation: smaller capacity may require more frequent recharges for continuous use scenarios.
ARB 4 Litre Aluminium Tank
The ARB 4 Litre Aluminium Tank emphasizes lightweight aluminum construction with TIG-welded end caps and an extruded body. It is designed for on-board installation with horizontal or vertical mounting options. Best for trailers requiring a compact, easy-to-install tank with modern aluminum durability. Caution: verify mounting space for either orientation on your trailer model.
EVIL ENERGY 1.5 Gallon Tank Kit
The EVIL ENERGY 1.5-gallon kit includes a complete installation set: a steel air tank, six 1/4″ NPT ports, a 150 PSI rating, and all necessary fittings. Best for DIY trailer air systems requiring a ready-to-assemble package with expansion potential. Advantage: six ports allow flexible configurations for horns, air suspension, or tire inflation. Limitation: steel construction may require corrosion management in aggressive environments.
Buying Guide: Key Considerations For Trailer Air Tanks
- Larger tanks (5 gal / 18 L) provide longer operation between fills, helpful for frequent use or multiple components. Smaller tanks save weight and space for compact trailers.
- Material choice: Aluminum tanks are lighter and corrosion-resistant, while steel tanks are typically robust and economical but heavier and prone to rust in harsh conditions.
- Mounting and orientation: Check if the tank supports horizontal or vertical mounting to fit your trailer layout. Some models are designed for easy on-board installation.
- Port configuration: Look at port quantity and size (NPT) to ensure compatibility with your hoses, valves, and accessories. More ports offer flexibility for multiple devices.
- Integrated features: Some tanks include pressure switches, gauges, or complete kit assemblies. Determine if you need a full kit for quick setup or a standalone tank for custom builds.
- Durability and environment: For trailers exposed to road dust, moisture, or salt, choose corrosion-resistant materials and protective coatings.
- Installation considerations: Consider space, weight distribution, and mounting hardware when integrating with the trailer’s chassis and suspension.
Frequently Asked Questions
- What size air tank is best for a trailer? It depends on usage. For occasional inflation and basic tools, 1.5–4 gallons suffices. For continuous operation or multiple devices, 5 gallons or more provides longer runtime between fills.
- Should I choose aluminum or steel for my trailer tank? Aluminum is lighter and corrosion-resistant, ideal for lightweight trailers. Steel is robust and cost-effective but heavier and more prone to rust without proper coating.
- Do tanks come with installation kits? Some models include complete kits with hoses, fittings, and gauges. Others are standalone tanks needing separate components for setup.
- Can a tank be mounted in either orientation? Many tanks support horizontal or vertical mounting, but always verify with the specific model’s mounting instructions.
- Is a pressure switch or gauge necessary? A pressure switch automates valve operation, and a gauge helps monitor fill levels. They are helpful but not mandatory if you are building a custom system.
- How do I prevent corrosion on steel tanks? Regular inspections and protective coatings are important in harsh environments. Clean and inspect seals and fittings periodically.