5 Gallon 8 Port Air Tank

(Seven 1/2" NPT Ports, One 3/4" NPT Port)


5 reviews

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The standard tank for all of our 5-gallon kits, our 5-gallon 8 port air tank is perfect for any onboard air applications such as adjusting tire pressure, load leveling, supporting a Jake Brake and so much more!

Made in the USA with the highest level of quality control, our 5-gallon air tank meets all SAE J10 & FMVSS 121 specifications. This durable tank is rated for a max of 150 PSI and burst rated for up to 300 PSI, meeting all DOT requirements. The seven 1/2“ ports and one 3/4“ port provide maximum airflow, which is great at preventing bottleneck issues found in other tanks. The high flow ports make any onboard air applications work more effectively and are mandatory for the massive locomotive train horns that demand a lot of air, such as the Nathan AirChime or Leslie train horns.  

The ports are positioned for convenience and ease of installation with 4 ports across the side, 1 on each end, 1 on top, and then 1 on the bottom. This makes it very easy to install a drain cock and safety blow-off valve even if you mount the tank upside down or sideways. This tank is powder-coated black and the inside is coated with a rust inhibitor to help protect your investment. Simply put, this is one of the highest quality 5-gallon air tanks you can buy. 

As an important safety precaution,  a safety blow-off valve should be installed with any air system. A safety blow-off valve is designed to keep the system from over-pressurizing and to prevent damage to other components. It is suggested to use a safety blow-off valve with a PSI rating between 25-35 PSI higher than the maximum pressure of the pressure switch.

For example, 150 PSI systems require a 175 PSI safety blowoff and 120 PSI systems require a 150 PSI safety blowoff.

  • Powdercoated black finish
  • Interior coated with a rust inhibitor
  • Meets SAE J10 & FMVSS 121 specifications
  • Made in the U.S.A.!
  • 2-year manufacturers defect warranty
  • HornAir 5-gallon 8 port air tank
  • Part Number: TA-508H
  • Volume: 5 gals (18.92 L)
  • 1/2" NPT Ports: 7
  • 3/4" NPT Ports: 1
  • Burst Pressure:  300 PSI
  • Working Pressure: 150 PSI
  • Tank Length: 20.5″ (520.7 mm)
  • Tank Diameter: 9.5″ (241.3 mm)
  • Tank Height: 11.5" (292.1 mm) (With Legs)
  • Tank Weight: 20.5 lb (9.3 Kg)

5-Gallon Air Tank Dimensional Drawing

  • Money-Back Guarantee/Refund Policy
    All merchandise unless otherwise indicated may be returned within 30 days from the shipment arrival date for a refund. A Returned Merchandise Authorization (RMA) number is required for all returns. A 15% restocking fee may apply. Additional deductions may be made to reflect the products current market value. These terms apply to all refunds. Most products are shipped with a refund/replacement guarantee period unless otherwise noted in the product listing. Customers must inform HornBlasters.com of any order discrepancy within 7 days from the invoice date so that we may investigate and resolve the situation accordingly.
  • Warranty
    This product is backed by our 2-year Manufacturer's defect warranty!
  • HornBlasters.com Satisfaction Guarantee
    HornBlasters.com offers our customers a 30-day satisfaction replacement or refund guarantee on all purchases, except when otherwise noted in the product listing.
  • Cross-Shipments
    HornBlasters.com will not cross-ship returned merchandise.
  • Physical Damage Policy
    Physical damage to any product purchased at HornBlasters.com will effectively void warranty coverage. Physical damage includes but is not limited to improper handling and/or any other type of damage sustained by irregular usage.

Warnings & Notices

Safety warning icon

This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.p65warnings.ca.gov.

Customer Reviews

4.8 Based on 5 Reviews
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Tim D.
United States United States

Test Lab Pneumatic System

I bought 2 of these tanks to hook lab equipment to. Using these tanks has guaranteed that we will not have air-line starvation issues when multiple devices are running. I shopped for other air pigs... but this tank is 75% cheaper than some of the other options which have this many ports.


5 gallon tank

I was running two 2 gallon tanks but wanted a larger tank for my horns. Love this tank and it's plenty big enough.


5 gallon air tank

Perfect for the horns and my air bag system!


This isn't your grandma's tank

Featuring a full gallon more than a 4 gallon air tank, this gem is the centerpiece of my pneumatic system. Whether it's blasting a horn, inflating a flamingo, or blasting a horn, this tank always delivers. Will likely become a cherished family heirloom, to be passed down through the ages.


Excellent products and service.

Easy to shop and order exactly what you're looking for.Prompt processing and shipping.