The advanced-design pleated powdered activated carbon filter for Big Bubba has an amazing 41.5 square feet of filtering surface. As compared with carbon block filters, the pleated design provides virtually unrestricted flow and far greater resistance to premature clogging. The filter has a theoretical dechlorination capacity of about 140,000 gallons of ordinary city tap water at 12 gallons per minute. The Big Bubba cartridge is ideal for long term chlorine removal and aesthetic improvement of city tap water.