US PVC (ASTM – D-1785), Copper Type “K” or Type “L”, Metric PVC Pipe (DIN 8062)
Note: for more metric model numbers, download metric datasheet 85000-070.
Pool Turnover Calculator
Blue-White Pool Turnover Calculator
Flow Rate (GPM):
The pool turnover rate is important for proper filtration. Not cycling enough water through the filter can result in swimming pool algae blooms, cloudy pool water and water balance issues.
One turnover only filters 37% of the water. After a second turnover, 86% of the water has been filtered. It takes four turnovers to filter 98% of the pool water. Many commercial codes require a minimum of 4 turnovers per 24/hr.
Different water use has different filtration needs. Therefore they have different recommended target turnover times. The volume of water, activity and contamination load need to be considered when factoring the optimal turnover rate.