Pool Pump Types: Single Speed vs Two Speed vs Variable Speed
Short answer: A single speed pump runs at one speed, a two speed pump has a low and a high setting, and a variable speed pump can run at many speeds and uses much less electricity at lower speeds. Since a federal efficiency rule took effect in July 2021, new dedicated-purpose pool pumps sold in the U.S. must meet efficiency standards that push the market to variable speed. Make sure each quote names the pump brand, model and type.
The three types
| Type | How it works | Notes |
|---|---|---|
| Single speed | One fixed speed, always full power | Cheapest to buy, most expensive to run. Now largely off the market for new sales. |
| Two speed | A high and a low setting | Saves energy when running on low. Also largely replaced. |
| Variable speed | Adjustable speed in small steps, often programmed by schedule or automation | Highest upfront price, lowest running cost, usually quieter. |
Why variable speed is standard now
A U.S. Department of Energy efficiency standard for dedicated-purpose pool pumps took effect on July 19, 2021. Trade sources say it effectively moved the market from single and two speed pumps to variable speed designs. Check with your builder which pump models are available under the current rule.
Why speed matters for your power bill
A pump's electricity use falls sharply as its speed drops. Manufacturers state that a variable speed pump running at about half speed can use roughly 85 to 90 percent less energy than running at full speed. Those are manufacturer claims under specific assumptions. Actual savings depend on your run schedule, plumbing, pool features and local electric rates.
What to check on a pool quote
- Brand and model, not just "pump." Two "variable speed pumps" can be very different units.
- Sizing. A waterfall, spa jets, a cleaner and a heater all affect how much flow the system needs. Ask how the pump was sized for your design.
- Automation. Variable speed pumps work best when programmed through a control system. Ask whether automation is included.
- Warranty. Ask who handles pump warranty claims, the builder or the manufacturer. See pool warranties.
- Filter pairing. Pump and filter should match in flow and size.
Comparing quotes
If one quote is cheaper because it lists a lower grade pump, adjust the comparison. See why quotes differ and how to compare pool quotes.
Frequently asked questions
Is a variable speed pump worth it?
For most pools, yes, because the pump is one of the largest electricity users and variable speed pumps run efficiently at low speeds. Savings depend on how you run it and your electric rate.
Can I still get a single speed pump on a new pool?
Federal efficiency rules for dedicated-purpose pool pumps that took effect in July 2021 have largely removed single and two speed pumps from the market for new sales. Ask your builder what is offered.
Do it automatically
Pool Quote Compare reads two to four proposals from PDF or pasted text, fills in the fields, and shows the quotes side by side with exclusions lined up.
Compare the pump and equipment lists in your quotes