The 570 series has become the most popular contractor's extraction cleaner by choice... and this is not by chance, but by design. The full Structofoam construction is designed to take the bangs and bruises which any machine will suffer in true commercial use because that’s what you need - a machine who's construction is beyond reproach and will give you years of reliable service. The Structofoam 570 is built to the full TwinFlo’ specification and incorporating a Powerflo’ pump and quick connect liquid system. The containers are also full Structofoam incorporating Numatic's unique “tank within a tank” system to maintain a compact and usable size.