Pool Pump Turnover Rate: How Many Hours to Filter?

What turnover rate means as a term

Turnover rate is the time it takes the pool pump to move an amount of water equal to the pool's entire volume once. The phrase appears in pool discussions as shorthand for how long a pump must run to circulate the full body of water through the filter system.

A listing usually does not print a turnover rate. What it prints is a flow figure, gallons per hour (GPH) or gallons per minute (GPM), along with horsepower, speed type and voltage. The pool's volume is something the pool owner knows or measures. Turnover is the relationship between those two numbers.

A turnover rate expresses that time in hours. The figure is a description of the relationship between the pool and the pump, not a spec a seller prints. Shop with the two numbers, pool volume and stated flow, kept separate.

Where turnover appears in a listing

When you read a pool pump title, look for the stated flow figure and the pool type the seller names. Some titles add phrases such as "for pools up to a certain gallon size" or "for above ground pools." That phrase is a stated detail, read as the seller's words, not as a promise about filtering.

Most pump titles lead with the maker's model name, then the speed type, horsepower and voltage. The flow figure often appears in the bullet list or the image set. Reading the image set matters because a seller may print the flow only on a motor nameplate image.

A buyer comparing two pumps can compare the stated GPH or GPM figures side by side. That is a comparison of stated details only. The flow rate guide explains how to read GPH and GPM in a title.

Why this site matches no pool volume to a turnover figure

This site does not calculate turnover for a pool and does not publish a recommended number of turnovers per day. A turnover count depends on the pool's construction, bather load, climate, filter type and local guidance. None of those can be read from a catalogue listing.

The same rule applies to horsepower and pool volume. This site does not match any horsepower figure to a pool size, and it does not convert GPM into a pool volume. For a match, the maker's sizing page and the installer decide. See the horsepower guide and the pool volume guide for the terms.

ENERGY STAR, a government program, certifies pool pumps that meet its efficiency criteria. The program's pages explain why variable speed pumps exist. This article does not quote energy or cost figures from that program; a turnover rate is not an energy recommendation.

What to ask the maker and the installer

Before you buy, collect the questions the maker's sizing page asks. Pool pump makers such as Hayward and Pentair publish sizing calculators and "how your pool works" pages on their sites. Those pages take the pool volume and plumbing details and return a flow figure for the pad.

Ask an installer the same questions after you read the listing. The installer matches the stated flow and horsepower to the actual plumbing and filter. This article recommends that step rather than a figure.

• What is the pool's volume in gallons?
• What flow does the pump state at the installed plumbing?
• What filter does the pump feed?
• How many hours per day will the timer run the pump?

Related listing terms: flow, volume and cycle

Several listing terms sit near turnover in a pump title. Flow rate (GPH or GPM) is the pump's stated output. Cycle time is how long the pump runs in one timer period, and cycles per day is how many times it runs. Speed type, single, dual or variable, changes how the pump reaches those figures.

Above ground pool titles may add filter words such as sand or cartridge. A pump with a stated flow feeds the filter; the filter's tank size is a separate listing word. See the sand filter guide for combo titles.

Related articles explain the surrounding words: cycles per day, flow rate and horsepower versus THP.

Using the maker's sizing tools

The maker's pages are the closest thing to a turnover calculator. Hayward's site points to a Total Dynamic Head calculator, and Pentair's product pages link pool calculators and a "how your pool works" guide. Those tools take the pool volume and plumbing details and return a flow figure for the pad.

Once you have a flow figure from the maker's tool, compare it to the stated GPH in the listings you are considering. Then choose the pump type that fits the construction of your pool, an inground pump or an above ground pump, and a speed type, such as a variable speed pump.

Comparison is by stated details: the flow figure, the horsepower band, the speed type and the pool type. This article does not claim any pump filters faster or better; it only tells you where to read the figures and whom to ask for a match.

What to pick for your situation

Questions

What is a pool pump turnover rate?

The time it takes the pump to circulate an amount of water equal to the pool's total volume once. It combines the pool's volume and the pump's stated flow.

How many turnovers per day are recommended?

This article does not publish a recommended number. The right count depends on the pool's construction, use, climate, filter and local guidance, and is set by the maker's sizing page and the installer.

Where does turnover rate appear in a listing?

It usually does not appear. Listings state flow in GPH or GPM. Turnover is derived from that figure and the pool volume.

Can you compare pumps on turnover?

Compare on stated details: flow in GPH or GPM, horsepower, speed type and pool type. This site matches no turnover figure to a pool.

Who decides the turnover for your pool?

The maker's sizing page and the installer. Makers such as Hayward and Pentair publish sizing calculators for that step.

What words sit next to turnover in a listing?

Flow rate (GPH or GPM), cycle time, cycles per day and speed type. Read the flow rate guide for the units.