www.pmmag.com/articles/86527-self-cleaning-showerhead-sloan-valve-co
Self-Cleaning Showerhead - Sloan Valve Co.
January 1, 2003

Sloan Valve Co.'s Act-O-MaticR 2.5-gpm showerheads combine self-cleaning capabilities with a "Cone-Within-A-Cone" spray. The showerheads use a pressure compensating flow control that provides consistent and powerful flow at low pressures, thus water savings are realized. Incorporates a unique self-cleaning spray disc that eliminates sand and other particles after each use.
Circle 11