PWP DI Cartridge with Resin - 21 Inch

PWP DI Cartridge with Resin - 21 Inch OVERVIEW The Pure Water Power DI Cartridge with Resin - 21 Inch is a replacement part for your PWP water purification system. This pre-loaded cartridge provides you with quality virgin resin and is ready for use once you take it out of the box and quickly install it into your system. Once your TDS starts reading above 10 ppm, be sure to change out your resin by refilling the cartridge. Resin color will vary.