American Jetter AJ583D and AJ51TD Comparison. Both trailer mounted drain jetters, have Kubota water cooled diesel engines and belt driven Udor pumps. The AJ583D series is a single axle trailer with 18 GPM 4000 PSI and a 300 gallon tank. The AJ51TD series is a tandem axle trailer with a 2025 GPM pump and a 330 gallon tank, which can be upgraded to 600800 gallon capacity. Both have a 20 gallon diesel fuel tank. And are upgradable to 25 GPM 4000 PSI. 5000 PSI models are also available. Both have a hydraulic powered 180° rotating hose reel. They are also available with wireless remote, hot water and many other options. For more information contact us at 8669443569 or www.americanjetter.com