Home Appliances Design Classic+ Water purifier by Future Factory Dr. Aquaguard Classic Plus is a modern interpretation of a 21-year-old, best-selling water purifier in India. The objective was to make it more relevant to contemporary Indian homes, while maintaining its legacy and trust. Classic Plus is the world's first in-wall water purifier. Functional components are mounted on the rear casing that goes inside the wall, giving the front panel a clean and flush aesthetic. The product assembly allows for quick and easy servicing through the removal of its front casing, that is held onto the main body using discreet button magnets.