5 Things to Know About Pool Pump Size

Bigger is not better Most people oversize their pool pump, but bigger pumps cause cavitation and energy waste, not better performance.

Plumbing diameter matters more than pool volume A 30,000-gallon pool with 1.5-inch pipes cannot handle a 2 HP pump. Match the pump’s flow curve to your pipe size and head loss.

Use the rule of thumb for horsepower 1 HP works for most residential pools up to 20,000 gallons with 1.5-inch plumbing. Go to 1.5 HP only if you have 2-inch pipes or significant elevation change.

Buy a variable speed pump A variable speed pump lets you dial in exactly the flow rate you need, saving 50-80% on electricity and eliminating guesswork.

Do not buy horsepower you will not use Oversizing wastes money on the pump and on energy bills. Stick to what your plumbing can handle.