Pool Tip of the Day – Proper Flow Through Your Pool Filter

I’d like to talk about sufficient flow through your pool filter and how it can affect your water quality. In order for your pool to maintain a healthy water quality, you must have one turnover every 6 hours, which is considered standard in most state jurisdictions. For a spa, the turnover rate is every 30 minutes. Turnover rate is defined as the time it takes for the circulation system to move the number of gallons equal to the volume of water in the pool through the filtration equipment. See the formula below: Turnover rate (in hours) = Pool volume / Flow rate / 60 (minutes per hour) For example, if you have a 15,000-gallon pool and you have a flow rate of 75 gallons per minute, your turnover rate is 3 hours and 20 minutes. Turnover rate = 15,000 / 75gpm / 60 Turnover rate = 3.33 hours Your pool’s pump and filtration system should have been designed to meet this specification. If you have a concern, give me a call and I can take a look at it for you. Let’s break it down to easy stuff. Make sure the pressure gauge on your filter is in good working order and can be read easily. You should note the operating pressure when a new filter has been installed. When the pressure increases to 8 psi above the starting pressure, it is time to clean your filter. ***Never exceed 30 psi for long periods of time as this puts a lot of strain on your entire filtration system and can cause premature failure! Maintaining a pressure between 10 psi and 25 psi is satisfactory when the pump is at normal operating speed. This will maintain the flow necessary to maintain the water quality in your pool. **Keep in mind, the better the flow rate, the better your pool and spa’s heater and erosion feeders will operate as well. Maintaining good circulating flow in your pool will also keep the disinfectants evenly dispersed. If you have any questions, concerns, or if you would like a free estimate on replacement equipment or a regular service plan, please give our offices a call.