Patent attributes
A filtration system for cleaning a fluid, typically water, that is contained in a tank having a rounded base and which cleans, during the backwash cycle, the filter media and, in particular, cleans the media in a usually stagnant area found in the rounded base of the tank. Most filtration system include a first pipe array located above the rounded base which provide for backwashing of the upper portion of the tank, but leaves the base area below the first pipe array stagnant and subject to the growth of harmful bacteria. The present invention adds a second array which is located in the base area and therefore is able to clean during the backwash cycle, an area that is left stagnant in most other systems. The second array is configured to follow the contours of the base of the tank to give it a greater cross sectional area than a flat array. This configuration results in greatly improved effectiveness over that provided by the conventional single flat array.
