Take a stand for higher floor cleaning performance and productivity Designed for reliable, efficient floor cleaning, the Clarke® SA40™ Stand-On Disc Scrubber provides a flexible, extremely maneuverable and compact solution for small- to medium-size areas. Maximize your cleaning productivity with a 12-gallon solution tank and low flow rate, which provides up to 75 minutes of scrub time without refilling. In addition, you can increase down pressure on the cleaning pad to 75 pounds to clean problem areas fast.