In 1992, NewMarket Naturals, of Dayton, Ohio, offered the world’s first refillable shower filter. Now, the company introduces the April Shower™ Select model with a date-select ring, more filtration media, longer-lasting cartridge, and priced to keep dealers more competitive with the rising cost of other shower filters. The shower filter is easy to install and allows customers to select the date of installation simply by turning the adjustable date-select ring to the arrow on the housing marked “install.