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CNG Tank Replacement

Extend the Life of Your CNG Vehicle

A-1 Alternative Fuel Systems provides complete CNG cylinder replacement services for light-, medium-, and heavy-duty vehicles. From individual vehicles to large commercial fleets, our team can replace expired or damaged CNG cylinders and help keep proven vehicles in service longer.

School Bus

Trusted CNG Tank Replacement Experience Since 1995

Since 1995, A-1 Alternative Fuel Systems has provided CNG tank replacement solutions for light-, medium-, and heavy-duty vehicles. Our experience includes school buses, transit and paratransit vehicles, work trucks, refuse vehicles, delivery fleets, passenger vehicles, and other CNG-powered applications.

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Whether you are replacing a single expired cylinder or updating an entire fleet, A-1 can help identify the correct replacement tanks, develop the required mounting solution, complete the installation, and return the vehicle to service.

Extend the Life of Your Vehicles

Replacing expired CNG cylinders can be a cost-effective way to extend the useful life of vehicles that are otherwise still performing well. Instead of replacing an entire vehicle because its original fuel cylinders have reached the end of their certified life, A-1 can evaluate the existing fuel system and provide a replacement solution designed around the vehicle.

When Do CNG Cylinders Need to Be Replaced?

CNG cylinders have a defined service life established by the cylinder manufacturer and applicable certification standard. Depending on the cylinder and its original certification, the service life may commonly be 15, 20, or 25 years.

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Once a cylinder reaches its marked expiration date, it must be removed from service. CNG cylinders are not simply recertified to extend their original service life beyond the manufacturer's expiration date.

The expiration date and other important cylinder information are identified on the manufacturer's cylinder label.

Complete CNG Tank Replacement Services

Cylinder Identification & Sourcing

A-1 identifies existing cylinder specifications and helps source appropriate replacement cylinders for the vehicle and application.

Custom Mounting & Integration

When direct replacement cylinders are unavailable, A-1 can develop mounting and integration solutions around available cylinder sizes and vehicle packaging.

Fuel System Inspection

Related CNG components can be inspected during the replacement process to identify aging, damaged, or serviceable components.

Fuel System Evaluation

Our technicians evaluate the existing CNG fuel system, mounting structure, plumbing, valves, shields, and related components before replacement.

Cylinder Removal & Installation

Expired cylinders are safely defueled, removed, and replaced by technicians experienced with high-pressure natural gas fuel systems.

Testing & Return to Service

After installation, the system is checked for proper installation, securement, leak integrity, and operation before the vehicle is returned to service.

Vehicles We Support

CNG Tank Replacement Solutions for:

  • Transit & Paratransit Buses

  • School Buses 

  • Shuttle Buses 

  • Refuse Trucks 

  • Heavy-Duty Trucks 

  • Medium-Duty Work Trucks 

  • Delivery & Commercial Vehicles

  • Light-Duty Trucks & Vans 

  • Passenger Vehicles 

  • Specialty CNG Vehicles

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Don't see your vehicle listed?

A-1 works with a wide range of legacy and specialty CNG applications. Contact our team with your vehicle information and existing cylinder specifications.

A-1 Alternative Fuel Systems
"Clean air is our business"
LOCATIONS
A-1 Alternative Fuel Systems Headquarters 

2320 Stanislaus Street 
Fresno, CA 93721

1 (559) 485-4427 PST

A-1 Alternative Fuel Systems Manufacturing 

3608 Cooper Drive 
Elkhart, IN 46514

QUICK LINKS

© 2026 A-1 Alternative Fuel Systems. Designed by FH Design. Privacy Policy.

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A-1 Alternative Fuel Systems designs products for use with various vehicle manufacturers. All trademarks, logos, and brand names are the property of their respective owners and are used solely to identify vehicle compatibility. A-1 Alternative Fuel Systems is an independent manufacturer unless otherwise expressly stated. Vehicle specifications, fuel capacities, product availability, certifications, and configurations are subject to change without notice. Product images shown may include optional equipment and may not represent final production configurations.

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