used used clarke ex40 carpet extractor used carpet cleaning equipment hjs carpet extractor 5gl advance aquaclean tornado walk behind carpet extractor carpet extractor 9gl powr flite used 500 psi carpet extractor supernova self contained carpet clarke ex20 100h carpet extractor used edic galaxy 2000 500 psi 12 gallon 500 psi carpet extractor professional carpet extractors used advance 28 rider carpet extractor