Century Plus Scrubber Valve Constructed of heavy-duty, glass-reinforced nylon, stainless steel, brass and EPDM rubber materials, the Century Plus scrubber valves resist clogging and feature a patent-pending continuous scrubbing mechanism to actively fight dirt, algae and other particles from disrupting the functionality of the valve. The Century Plus scrubber valves are true dirty water irrigation valves, able to handle the harsh chemicals found in dirty water systems, such as chlorines, chloramines and water treated with ozones.