The 1998 Building Service Contractors Association International Carpet Guide says “The pile brush type vacuum will remove deeply embedded soil, and open up a nap more than a regular, lightweight vacuum. Usually, a pile brush machine will be used weekly on traffic lanes, monthly on all of the carpeted areas, and always just before any cleaning process. The pile brush vacuum is a dual-purpose machine because it is used both to maintain commercial carpet and to clean”.
Shaw Industries, one of the leading manufacturers of carpet, says, “Using a pile lifter in traffic lanes just prior to cleaning will remove the deeply embedded soil and open up the pile so the hot water extraction can be more effective. After using a pile lifter, the final step...will be less difficult.” Additionally, Shaw’s recommendation for in-house maintenance specifies “Use a pile lifter...in high traffic areas.” Shaw’s description of a pile brush might as well be Certified’s pile brush, it is “...an upright two motor vacuum with a large, adjustable, gentle bristle brush with a motor, a high suction vacuum motor, and a sand trap.”