TOWER-FLO® Series TFW use filament-wound fiberglass vessels available in three basic models, differentiated by filter vessel size in diameter inches: the TFW-20, TFW-24, and TFW-30. All TOWER-FLO® Series TFW self-contained filter plants consist of the following major components: base, pump, motor, strainer, facepiping, controls, and filter vessel. The filter plant shall be designed for a maximum filtration rate of 20 GPM per square foot of filter surface area and be shipped as a complete factory assembled and tested unit. Filter media shall be shipped with the unit for field installation.