RDS 20 Gallon Rectangle Diesel Auxiliary Fuel Tank 1
RDS 20 Gallon Rectangle Diesel Auxiliary Fuel Tank 2RDS 20 Gallon Rectangle Diesel Auxiliary Fuel Tank 3RDS 20 Gallon Rectangle Diesel Auxiliary Fuel Tank 4
Add Auxiliary Install Kit?:

Lead Time:  1-2 Weeks
Ships From: Florida


Customer Reviews
Share this page!

Model: RDS-74551
Manufacturer: RDS Manufacturing

This is the RDS 20 Gallon Rectangle Diesel Auxiliary Tank. This tank offers extra fuel capacity for a generator or other specialty application using diesel fuel. All tanks Meet DOT standards.

Diesel Install kits are optionally available. Not intended to be used for gasoline. Made in the U.S.A.

NOTE: For safety reasons, the filler neck of these tanks prevents them from being overfilled. Actual usable tank capacity is about 95% of the total advertised gallons.


  • Special Permit issued by the US Department of Transportation (DOT)
  • Aluminum rectangle diesel tank
  • Mounting brackets
  • Tank includes an automotive-style locking fill cap
  • 3/8in. drain with aluminum plug
  • Diamond plate finish
  • 1 year limited warranty

Please be aware that tanks have mounting tabs that extend the dimensions of the tank by 1 inch on each side. This is NOT accounted for when viewing the displayed dimensions of the tank. Please be sure to account for this when measuring for fitment of your tank.

Detailed Information

RDS Auxiliary Rectangle Fuel Tank Size
RDS Manufacturing
RDS Manufacturing Warranty Details:

RDS warrants all products to be free of defects in material or workmanship for a period of 1 year from invoice ship date from our warehouse. If upon our inspection we deem the item to be defective, RDS will determine whether to repair or replace the defective item. It is the customers responsibility to ship the item to RDS. No cost for labor, installation, or missing contents will be reimbursed. Damages due to shipping and handling, improper installation, abuse - intentional or accidental, or normal wear and tear are not covered by this warranty. Warranty is void if the tank has been altered.

INC 5000 Award!
Inc 5000 - Award - 2023
TankAndBarrel.com has been awarded a ranking with the INC 5000 - 3 years in a row - of the fastest growing private companies in America!