Hayward HFC 36 in. Sand Filter
These high-performance pool filters combine rugged construction, energy-efficient operation and superior flow rates for years of trouble-free filtration with minimal care. The weather-proof tank is constructed of a tough color-fast polymeric material and topped with a patented easy to use multi-port valve. Hayward high-rate sand filters offer the very latest in pool filter technology with smooth, efficient flow and totally balanced backwashing. A versatile seven-position control valve offers both easy operation and maximum efficiency. For crystal clear, sparkling water with minimum care, Pro Series filters set a new standard for performance, value and dependability.
Sand filters: Sand filters become clogged with floc after a period in use and they are then backwashed or pressure washed to remove the floc. This backwash water is run into settling tanks so that the floc can settle out and it is then disposed of as waste material. The supernatant water is then run back into the treatment process or disposed of as a waste-water stream.