Choosing the right pool pump size is essential for keeping your water clean, saving energy, and extending your system’s lifespan. An oversized pump wastes electricity, while an undersized one struggles to circulate water properly. The key is finding the balance between your pool’s volume and your plumbing system’s capacity.

First, calculate your pool’s total volume in gallons. Then determine the turnover rate—the time it takes to circulate all the water once. Most pools need a complete turnover every 8 hours. Divide the total gallons by 8 to find the gallons per hour (GPH), then divide by 60 to get gallons per minute (GPM). This figure will guide your pump selection.

Next, consider the total dynamic head (TDH)—the resistance caused by pipes, fittings, and filters. The higher the TDH, the stronger the pump you’ll need. Manufacturers usually provide performance charts that show which pump can meet your GPM at a given TDH.

Finally, choose an energy-efficient model, ideally a variable-speed pump. These allow you to adjust the flow rate, reducing power use and noise. Proper sizing ensures clean, clear water while saving you money every month.