Know before you buy: what types of pool filter are there, and which is best?

Key Takeaways

Choosing an efficient pool filter directly affects water quality and swimmer safety. Pool owners therefore need to understand what types of pool filter there are and which is best, so that it suits the pool size, budget and maintenance style.

A beautiful pool is not judged by its exterior design alone. What matters most is water that is always clear, clean and safe, and the system that keeps water quality up to standard is the pool filter pool filter or filter tank. However, the main problem for new pool owners is not knowing which system to choose, weighing value for money, filtration fineness and ease of maintenance. Before investing, it is worth learning what types of pool filter there are, which is best, and what the advantages and points to note are for each, so you can choose one that suits your needs.

Why the pool filter is the heart of every swimming pool

A pool filter is a mechanical cleaning device that works together with the pump. Its main job is to trap suspended particles, leaves, dust and even tiny bacteria in the water. Without a filter, dirt would build up until the water turned cloudy and eventually became a breeding ground for germs.

What parts does a pool filter have?

A pool filter in a standard system consists of the following main parts working together.

• Filter tank: The main vessel that holds the filter media, built to withstand water pressure and chemicals.
• Filter media: Such as pool filter sand, D.E. powder, cloth filter bags or paper cartridges, which trap dirt.
• Multiport valve: A device for switching operating modes, such as normal filtering, backwash and rinse.
• Centre pipe and laterals: Draw the filtered water and return it to the pool.
• Pressure gauge: A device that shows how clogged the pool filter is.

How does a pool filtration system work?

The filtration system starts with the pool pump drawing water from the pool through the skimmer or the bottom drain. The dirty water is sent through pipes into the filter tank, where it is forced through the filter media, which traps the dirt particles. Once the water has passed through the filter layer and is clean, it is returned to the pool through the return line. The system circulates water this way continuously to keep it clear and clean at all times.

What types of pool filter are there? A closer look at how each system differs

To choose a pool filter that fits your needs, you first need to understand the mechanism and media of each type. Today they can be divided into four main systems:

1. Sand filter

The sand pool filter is the most popular type worldwide. It works by passing water through a layer of pool filter sand or glass filter media.

• Filtration efficiency: Can trap particles of around 20-40 microns.
• Advantages: The sand filter is the easiest to maintain, has a long service life, uses media that is easy to buy, and has a low cost.
• Maintenance: Backwash when the pressure gauge rises, and replace the pool filter sand every 3-5 years.

2. Cloth pool filter (D.E. filter)

A cloth pool filter, or Diatomaceous Earth filter, uses D.E. powder, or diatomaceous earth, coated on the filter grids inside the tank.

• Filtration efficiency: The highest of all the systems, able to trap particles as small as 3-5 microns, giving crystal-clear water.
• Advantages: Gives the clearest and cleanest water, ideal for those who want perfection.
• Maintenance: More complex than other types: you must backwash and add fresh D.E. powder every time the system is cleaned.

3. Cartridge filter

This system uses a filter cartridge made of polyester sheets pleated and layered around a central core.

• Filtration efficiency: Mid-range, able to trap particles of 10-15 microns.
• Advantages: Saves water because no backwash is needed; you can take out the cartridge and hose it clean, and it saves installation space.
• Maintenance: The cartridge must be taken out and hosed clean every 1-2 weeks, and replaced every 1-2 years.

4. Smart Pipeless Filter

The latest technology, which removes the hassle of running pipes around the pool. This system has been developed to meet the needs of modern users perfectly.

• Filtration efficiency: Filters more finely than conventional filters and traps dirt better, thanks to its High Density Filtration System.
• Advantages: Saves space, installs quickly and carries no risk of leaking underground pipes, with formats to suit different pool structures as follows:
• Recessed smart filter: The TE smart filter is recessed flush with the pool edge. It does not need to be hung and has no protruding parts, saving space, installing quickly, being easy to maintain and trapping dirt more finely than conventional units.
• Smart filter for concrete pools: Integrates into the structureConcrete poolsdirectly, for a smooth, seamless design.
• Modern pipeless filter: Ideal for renovating old pools with leaking pipework. It installs flush with the pool edge and is ready to use immediately, with no need to break up the structure.
• Maintenance: Easy to maintain: you can open the lid to clean and check the unit at the pool edge straight away, without building a separate equipment room.

How to choose a pool filter that offers good value and suits real-world use

Whether you choose a sand filter or a cloth pool filter, it is important to consider the surrounding factors thoroughly. The factors to assess are as follows:

1. Pool water volume: The size of the filter tank and the pump must work in step so that the whole pool circulates within the standard 6-8 hours and the equipment is not overloaded.
2. Budget and upkeep: A sand pool filter has a low initial cost and is easy to look after in the long run, while a cloth pool filter costs more and involves ongoing spending on D.E. powder.
3. Water quality required: A cloth filter suits pools that need the clearest possible water. For general use, a sand filter or a pipeless smart system is enough.
4. Installation space: A sand pool filter needs quite a lot of equipment-room space, unlike a recessed pipeless smart filter, which saves space completely.

Take pool cleanliness to the next level with J.D.Pools technology

J.D.Pools is a leader in complete swimming pool construction, bringing greater convenience with smart pool filters, a pipeless filtration innovation that filters finely, installs easily and suits every type of pool. Our professional team has 30 years of experience, with quality guaranteed by 22 service centres nationwide, and we operate the largest pool and pool equipment factory in ASEAN.

Design a relaxing space that suits you today. If you are interested in pool filtration system installation or want extra convenience with a robotic pool cleaner for easier maintenance, fill in the form on the website to contact J.D.Pools today, or call 095-902-6555 or LINE OA: @jdpools to start building the pool that is truly yours.

References

1. What are the Differences Between Filter Types?. Retrieved 20 May 2026. From https://www.hayward.com/blog/post/what-are-the-differences-between-filter-types
2. What Are the Different Types of Pool Filters?. Retrieved 20 May 2026. From https://exploreindustries.com/explore-industries/types-of-pool-filters/

Frequently asked questions about pool filter types and which is best (FAQs)

Q: What size pool filter should I choose?

A: The filter size must be calculated from the total water volume of the pool (width x length x average depth). The filter tank and pump must work in step so that the whole pool can circulate through the filtration system within the standard 6-8 hours. Choosing the right size prevents the equipment from working too hard and keeps water quality balanced efficiently.

Q: What are the highlights and advantages of a smart pipeless filter?

A: The pipeless filtration system is designed to be recessed flush with the pool edge, with no need to hang it, no parts protruding into the pool and a flat top. It saves space because no separate equipment room is needed, and it removes the long-term problem of leaking underground pipes. It also installs quickly, is easy to maintain and traps dirt more finely than conventional filters.

Q: How can I tell when it is time to clean the pool filter?

A: Watch the pressure gauge on the pool filter tank. If the pressure rises 10-15 PSI above the normal set level, there is too much dirt clogging the system and it is time to backwash or clean the filter cartridge.

Q: How is a smart pipeless filter better than a sand filter?

A: Pipeless technology saves space by removing the need for an equipment room, can be recessed flush with the pool edge right away, and removes the long-term problem of leaking underground pipes, unlike the traditional sand filter, which needs pipework run around the pool.