Pleated vs Cartridge Filters: Robotic Pool Cleaner

What the words mean on a listing

When a robotic pool cleaner listing says "pleated filter" or "cartridge filter," it describes the part that traps debris inside the robot. A pleated filter is made of folded material, which gives it more surface area in the same space. A cartridge filter is usually a simpler, often cylindrical or flat mesh screen. Both do the same job: they hold what the robot picks up until you empty them.

The listing title may say "pleated filter," "cartridge filter," or just "filter." If the title does not name the type, the detail may appear in the bullet list or on the maker's page. The site's buying guides compare robots on stated details, so the filter type is one of the details you can compare. For a general overview of what to look for, see the best robotic pool cleaner guide.

Some listings use the term "filter basket" instead of cartridge. A filter basket is a container that holds the debris, often with a mesh screen. It is a type of cartridge filter. Pleated filters are sometimes called "fine filters" or "pleated fabric filters." The maker's page will clarify the exact design.

• Pleated filter: folded material, more surface area.
• Cartridge filter: simpler mesh or screen, often easier to rinse.
• Filter basket: a container with mesh, a type of cartridge.
• If the type is not stated, check the maker's page.

Surface area and debris retention

A pleated filter's folds create more surface area than a flat cartridge of the same size. More surface area can mean the filter holds more debris before it needs emptying, which is useful if your pool collects leaves or fine dirt. A cartridge filter may fill faster, but it can be simpler to rinse.

The type of debris matters. For fine particles, a pleated filter's fabric may trap them more effectively, but the maker's page will state the filter's fineness. For larger debris like leaves, a cartridge with a wider mesh may be easier to empty. The listing does not always state the filter's capacity, so read the maker's page for details. If your pool has a lot of leaves, you might also consider a robot with a larger debris capacity, as explained in the best cordless robotic pool cleaner guide.

Some robots come with two filters: a pleated fine filter and a cartridge coarse filter. The listing may say "dual filter system." This lets you switch depending on the debris. The maker's page explains how to use each filter.

Maintenance and cleaning

Both filter types need regular emptying and rinsing. A pleated filter may need more careful rinsing to remove debris from the folds. A cartridge filter can often be rinsed quickly with a hose. The maker's manual describes how to remove and clean the filter for your model.

Some robots have a top-load filter, which makes access easier. Others require opening the robot. The listing may say "top load filter" or "easy access." The maintenance frequency depends on how much debris your pool collects, not on a fixed schedule. For more on filter care, see the learn article on filter cleaning frequency.

After rinsing, let the filter dry before storing the robot. The maker's manual may recommend replacing the filter after a certain number of uses or when it shows wear. Replacement filters are sold separately. The listing may include a spare filter or a caddy that holds the filter.

What to read on the listing

Look for the filter type in the title or bullet list. Words like "pleated," "cartridge," "fine filter," or "filter basket" tell you what is included. If the listing says "filter basket," it may be a cartridge-style container. If it says "pleated," expect folded fabric.

The maker's page will state the filter's fineness, capacity, and cleaning instructions. The site's guides link to the maker's page for each robot, so you can compare filters across models. For a deeper look at filter fineness, read the learn article on filtration fineness.

Some listings mention "self-cleaning filter." This means the filter is designed to be rinsed easily, not that it cleans itself. The maker's page explains how it works. A self-cleaning filter may be either pleated or cartridge.

Matching the filter to your pool

Your pool type and debris load should guide your filter choice. Above ground pools often have different debris patterns than inground pools, so check the maker's recommendation for your pool type. The best robotic pool cleaner for both pool types guide can help you compare models that work for both.

If you have a wall-climbing robot, the filter type may affect how debris is collected from walls and waterline. The best wall climbing robotic pool cleaner guide offers picks that combine wall climbing with specific filter designs.

Consider how often you want to clean the filter. If you prefer less frequent maintenance, a pleated filter with more surface area may suit you. If you prefer quick rinsing, a cartridge filter may be better. The maker's page will give details on filter capacity and ease of cleaning.

Filter replacement and availability

Filters wear out over time. The maker's manual will tell you when to replace the filter. Replacement filters are available from the maker or authorized sellers. The listing may include a spare filter or a bundle with extra filters.

When buying a robot, check that replacement filters are available for that model. Some robots use proprietary filters that are only sold by the maker. Others use standard sizes. The maker's page lists compatible parts. For more on filter replacement, see the learn article on filter replacement.

What to pick for your situation

Questions

Which filter is better: pleated or cartridge?

Neither is universally better. Pleated filters offer more surface area, which can hold more debris. Cartridge filters are often simpler to rinse. Choose based on your debris type and how often you want to empty the filter.

How often should you clean the filter?

The maker's manual describes the cleaning frequency for your model. In general, empty the filter after each cleaning cycle or when the robot's indicator light suggests it. The listing may not state a frequency.

Can you use a pleated filter in a robot that came with a cartridge?

Use only the filter type the maker specifies for your model. The maker's page and manual list compatible parts. Using a different filter may affect how the robot operates.

Does a pleated filter clean better than a cartridge?

The filter's fineness and the robot's design matter more than the filter type alone. Read the maker's page for the filter's fineness and the robot's stated details. The site's guides compare robots on stated details.

How do you know if a filter needs replacing?

The maker's manual gives guidance on replacement. Signs include visible wear, tears, or reduced debris pickup. Replacement filters are available from the maker.

What is a self-cleaning filter?

A self-cleaning filter is designed to be rinsed easily, often with a quick spray. It does not clean itself automatically. The maker's page explains how to clean it.

Can you buy extra filters for your robot?

Yes, replacement filters are sold by the maker or authorized sellers. Check the maker's page for compatible parts. Some listings include a spare filter.