An Alternative to Pool Draining. Save Tucson's water and your time. Recycle your pool water instead of throwing it down the drain and buying more. We're not your typical pool draining service. Our process, called the Puripool Process, removes Calcium Hardness, Total Dissolved Solids (TDS), and Cyanuric Acid (CYA) from both residential and commercial swimming pools without draining or exposing the interior finish. All of this is done using our Mobile Reverse Osmosis Filtration Trailer. So the next time your pool maintenance company tells you it's time to drain your pool, consider us instead!