Wash water from filters is usually discharged to sewer with the dual aim of removing solids from the filter media and reducing pool water TDS. It is not possible to simply filter backwash water and recycle it back to the pool, as this would create a closed circuit and cause uncontrolled increase of TDS. Normal control of TDS is achieved by replacement (dilution) of high TDS water with low TDS make-up water. The CircleClear system captures backwash water in a common backwash tank and processes it automatically with the final step of reverse osmosis (RO). The reverse osmosis step removes 95-99% of the backwash water TDS, so that recycled water enters the pool at 10-100 ppm. You can recover up to 75% of previously wasted backwash water.
