Home & Garden Swimming Pools & Water Fountains & Ponds

How to Choose a Swimming Pool Pump

    • 1). Calculate the amount of water the pool holds and how much of it you need to move. When the pool is built, you will receive a calculation of how many gallons it contains.

    • 2). Determine the pool's turnover rate--how often you want water circulating out of the pool area. Divide the pool's water volume by how many hours you want for turnover. A turnover rate of four to six hours is recommended, according to the Pool Spa website. Divide the gallons by the number of hours for the turnover rate to determine your gallons per hour rate. This is the flow rate you wish to achieve.

    • 3). Check the manufacturer's flow rate and head ratings for the pump you are considering. Head is resistance to the flow of water, created by such factors as friction in the system. It represents wasted energy. You will have to take into account not only the internal head rating of the pump itself, but the amount of work it will have to do to overcome resistance to water flow in your entire system. Factors affecting the pump's overall efficiency include elevation changes the pump must overcome and friction created by turns and materials in the system of pipes it must force water through. Drains, filters, heaters, and skimmers all contribute significantly to head.

    • 4). Inspect a pool supplier's design chart to match the hydraulic profile of the pump you are considering to the size of pool you own and the piping. Contact a local pool supplier or the manufacturer for your pool for a chart.

    • 5). Choose the smallest pump possible for the size of your pool, recommends the Energy Savers website. A smaller pump will cost less in maintenance and pumping costs than a large pump that has too much horse power.

    • 6). Choose a pump that has stainless steel or brass screws on the impeller shaft or a metallic body for a pool with an electrolysis type system to reduce corrosion and increase water bonding.

    • 7). Purchase a two-speed or multi-speed pump if you have pipes that are two inches or larger in diameter or when you have a spa or waterfall installed in your pool.

    • 8). Install a modern, high-efficiency pump rated at 1/2 horse power when you have one and a half inch plumbing or less, advises the Swimming Pool Information website.

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