Used Fluid DrainUsed Fluid Drain 20 gallon 3614 Model 3614 20 gallon used fluid drain. Model 3614 features a stable, low profile tank design and large 18" offset bowl with metal filter screen. For evacuation, the tank can be pressurized by connecting a standard shopair hose, or by using a simple tire chuck. The height is easily adjustable by loosening and tightening a friction style lock ring, and a special telescoping tube design eliminates the need to extend bowl