[. . . ] The latest upgrades, however, have now made this superb range of units even better. [. . . ] All the existing features and benefits remain, to which new ones have been added. For example, drive and rear wheel traction has been improved, a new squeegee concept has been introduced for faster and better floor drying, there is a new recovery tank inlet system, and a brand new robust foot pedal concept has been added. Plus, the mixing takes place at the scrub deck ­ not in the tank, thus eliminating the need to empty and clean the tank since it only contains water. One bottle of highly concentrated detergent allows up to 10 water tank loads (of 157 litres) of operating time before needing to be changed or refilled. [. . . ] One bottle of highly concentrated detergent allows up to 10 water tank loads (of 157 litres) of operating time before needing to be changed or refilled. [. . . ]