Which sand filter is right for my pool?

Crystal-clear, clean, and pleasant water starts with proper filtration. A sand filter is an essential piece of equipment to maintain the water quality of your pool throughout the swimming season. But it needs to be properly sized!

This guide will help you choose the right sand filter based on the volume of your pool, whether it’s above-ground or in-ground. A correctly sized filter optimizes system efficiency, reduces maintenance, and ensures consistently enjoyable swimming.

Why Is Filter Size Important?

A filter that’s too small will constantly be overloaded, resulting in cloudy water, algae buildup, and premature wear on your system. On the other hand, a well-sized filter offers better filtration performance, reduces backwash frequency, and extends equipment life.

Recommended Filter Size by Pool Volume

For Above-Ground Pools
Pool Type Pool Size (Liters) Minimum Filter Size
Above-ground 15' Round (21,600 liters) 19"
Above-ground 18' Round (31,200 liters) 19"
Above-ground 21' Round (42,400 liters) 21"
Above-ground 24' Round (55,200 liters) 21"
Above-ground 27' Round (70,000 liters) 24"
Above-ground 30' Round (86,400 liters) 24"

For In-Ground Pools
Pool Type Pool Size (Liters) Minimum Filter Size
In-ground 12' x 24' (32,628 liters) 19"
In-ground 14' x 28' (44,391 liters) 21"
In-ground 16' x 32' (58,003 liters) 24"
In-ground 18' x 36' (73,487 liters) 24"
In-ground 20' x 40' (90,847 liters) 25"

* Figures are for reference only.
* Above-ground pool: estimate based on a depth of 52".
* In-ground pool: estimate based on a depth of 48".

Need a Hand?

Our Trévi experts are here to help you choose the right sand filter based on your pool, your swimming habits, and your budget. Visit us in-store or online to discover our most reliable and high-performance models.

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