Swimming Pool Pump

Flow Rating: Your filter is built to withstand a certain volume of water flowing through it. Check your filter’s flow rating to determine the maximum horsepower acceptable for your setup.

Pipe Size: You’ll run into problems if the PVC used to plumb your pool is too small in circumference to handle your pump’s horsepower. Older pools typically used 1.5-inch diameter pipes, which are not large enough to handle water flow from a high-horsepower pump. Those with 2.5-inch or 3-inch pipes may choose a pump with more than one horsepower.

Horsepower: More isn’t always better. Even if your pipes could handle a three-horsepower pump, you may not need it. Choosing one that’s too high is a waste of power and money. If you’re in between two sizes, choose the one with more horsepower.

Voltage: Pool pumps are available in either 115-volt or 230-volt models. You can use a multimeter to check the voltage coming to your existing pump. The output terminals on your pump timer are an easy place to use the multimeter. If you’re not comfortable using a multimeter or working with electricity, ask a pool pro to help you.

Side or Top-Mount: The mount you need depends on your setup. Water is pumped into the filter, so the location of the filter will determine whether you need a side- or top-mount pump. If you’re building fresh or moving everything around, side mounts may offer easier access.