Pool Cleaner Maintenance: Filter Care and More

The three pool cleaner types and their filters

Pool cleaners fall into three types: robotic, suction-side, and pressure-side. Each collects debris differently, and that difference decides which parts you maintain. Robotic cleaners are self-contained units with their own filter chamber or bag. Suction-side cleaners attach to the skimmer or a dedicated suction line and pull water through the pool pump's filter. Pressure-side cleaners use a booster pump and a separate debris bag or canister.

When you read a cleaner listing, the words "filter", "bag", "debris bag", "fine mesh", or "leaf canister" describe the collection point. A listing that says "top-load filter" tells you the filter is accessible from above, while "filter bag volume" states the size in quarts or liters. None of these words imply how well the cleaner works, only what you will maintain after each run.

• Robotic: onboard filter or bag that you empty and rinse.
• Suction-side: the pool pump's strainer basket and skimmer basket do most of the work.
• Pressure-side: a separate debris bag or canister that you empty.

Filter care for robotic pool cleaners

A robotic cleaner collects dirt, leaves, and fine particles in its own filter. After a cleaning cycle, you open the filter chamber, lift out the mesh or filter bag, and rinse it with a garden hose. The maker's manual describes how to grip the latches and how to reinstall the filter. Some robots have a fine-mesh filter for sand and silt; others use a larger bag for leaves. The listing may state the filter surface area or mesh size in microns.

You should not soak the filter in chemicals unless the manual says to do so. Let it air dry before you store the robot. If the filter tears or the mesh separates from the frame, replace it with a part the maker lists for that model. A clean filter lets water pass through, but this article cannot promise any cleaning result. The manual gives the replacement interval, not the site.

For more on how filters relate to the cleaner type, see Robotic, Suction, or Pressure Cleaner.

Filter care for suction-side and pressure-side cleaners

Suction-side cleaners do not have a filter of their own that you empty every run. They use the pool pump's strainer basket and the skimmer basket. You clear those baskets when they fill with debris. Some suction-side models also include a small internal bag or a check valve screen; check the listing for the words "internal debris bag" or "leaf trap". Clean that bag the same way you would a robot filter.

Pressure-side cleaners use a booster pump and come with a separate debris bag or canister. The listing often names the bag volume in liters or quarts. You empty the bag after each cycle, rinse it, and reattach it. The canister may have a handle and a clear lid so you can see when it is full.

The pool pump's filter is your main care point for suction-side cleaners. Read the pump manual for how to clean the strainer basket. For a pump listing, that basket is called a "strainer basket" or "pre-filter basket". If you are choosing a pump, see variable speed pool pumps for one option. For more on how cleaners connect to the pump, read Suction Pool Cleaner Pump Match.

Inspecting brushes, wheels, and tracks

Every cleaner has a part that scrubs the pool surfaces. Robotic cleaners use brushes, wheels, or tracks. Suction-side cleaners have a brush or a sweeper arm. Pressure-side cleaners often have a brush and a turbine. The listing states "brush type" (for example, "roller brush" or "scrubbing brush") and "wheel or track". You inspect these parts for debris such as hair or string that can wrap around them.

Remove any tangled material with your hands or a blunt tool, following the manual's warning not to damage the rubber. Look for worn or missing bristles. If a brush loses bristles or a track cracks, the maker's parts page lists a replacement. The manual states when to replace, and the site cannot offer a schedule.

For robots that climb walls, the tracks and wheels affect how the unit moves. The listing word "wall climbing" describes the seller's claim, not a maintenance promise. Read Do You Need a Wall-Climbing Pool Cleaner to see how it compares across models.

Storing your pool cleaner

After a cleaning cycle, you should rinse the unit with fresh water to remove chlorine or salt residue. Let it dry, then store it out of direct sunlight and away from freezing temperatures. Sun and cold can damage rubber seals and plastic parts. The maker's manual gives the storage temperature range; a listing may say "freeze protection" or "winter storage" as a feature.

For corded robots, coil the power cord loosely and secure it with a strap. For suction-side and pressure-side cleaners, disconnect the hose and coil it separately. Do not hang the cleaner by its cord or hose. Keep it on a flat surface, such as a shelf or a rolling cart. The listing may mention a caddy or a carry handle, which makes storage simpler.

Before you store for the season, empty the filter or bag and clean the brushes. The manual describes any winterization steps, and this site does not give those steps because they vary by model.

Maintenance as a shopping question

When you compare cleaners, look at how the filter and brushes are made. A robotic cleaner keeps collection in its own filter, so you do not need to clean the pump's strainer basket as often. A suction-side cleaner relies on the pump, so your pump care routine affects the cleaner. A pressure-side cleaner adds a booster pump and a debris bag, which is another part to empty.

The listing terms "top-load filter" and "easy empty" point to how simple the maker aims to make the filter access. A caddy or a carry bag helps with storage. The warranty and the manual are the final word on maintenance. Makers publish manuals on their product pages, such as Hayward, Pentair, and Maytronics. Check the manual that ships with the cleaner for the specific maintenance steps.

For a first cleaner, the type you pick determines your daily and weekly tasks. If you want a cleaner that runs on its own filter and does not depend on the pump, a robot matches that routine. Read Above Ground vs Inground Pool Cleaners for pool type advice.

What to pick for your situation

Questions

How often do you need to empty a robotic pool cleaner's filter?

The maker's manual states the interval. In general, you empty the filter after each cleaning cycle, or when the filter looks full. The listing may say "filter bag volume" so you know the size before you buy.

What is the difference between a filter bag and a canister on a pressure-side cleaner?

A filter bag is a fabric or mesh pouch you rinse. A canister is a rigid container with a lid that you empty. Both hold debris before you dump it. The listing will call it either "debris bag" or "leaf canister".

Do suction-side cleaners have a filter inside the unit?

Some do. The listing may say "internal debris bag" or "leaf trap". Others rely entirely on the pool pump's strainer basket and the skimmer basket. Read the bullet list in the listing to see which part the cleaner includes.

Should you store your corded robot with the cord coiled or stretched?

Coil the cord loosely and secure it with a strap. Do not hang the robot by the cord. The manual's storage section gives the exact method for your model.

Can you clean pool cleaner brushes with soap?

The manual tells you which cleaning solution is allowed, if any. Many makers say to use plain water. Soap may leave a residue, and the site cannot recommend a chemical product.

Does the pool cleaner need maintenance during the off season?

Yes. Empty the filter, rinse the unit, and dry it before storing. The maker's manual describes any winterization steps, such as removing batteries or draining the hose. A listing may say "winter storage" to indicate the unit is designed for that.