Pentair Pool Filter Cartridges

There’s no fixed schedule for Pentair cartridge filter cleaning because your pool is different from others. How often you replace Pentair filters and how often you clean them depends on things like:

• How long your pool stay open during the year
• The amount of debris that ends up in the water
• The type of pool and filter system you have

If you’re unsure, a local pool professional can help you figure out a cleaning schedule that makes sense for your setup. You typically need new Pentair cartridge pool filters every 3 to 5 years. However, you may need to replace them more frequently when you neglect maintenance or use the pool a lot.

Whether or not you need tools depends on the type of closure system your Pentair filter uses:

Tools are required if:

The filter uses a clamp assembly.

Common examples: These are typically found on DE filters or 4-cartridge filters.

No tools are required if:

The filter uses a locking ring. These are designed to be opened and closed by hand.

Common example: The single cartridge filter.

Note: If you hire a pool cleaning professional, they will bring the necessary tools, so you do not need to provide your own.

If your pool has an automation system, make sure it’s in service mode. After that, switch off the power to all pool equipment at the control panel breakers to prevent pumps or other features from starting while you’re working on the filter.

Air could get trapped inside your filter system, and it can force the lid to separate from the filter housing if you let it build up and stay stuck. Unfortunately, this can cause serious injuries, so you may want to have a trained pool professional clean and maintain your Pentair swimming pool filters.

• Make sure the pool water level is high enough. Low water levels can affect circulation and reduce pressure.
• Check the skimmer baskets for leaves or debris that may be blocking water flow. At the same time, you should also clean the pump pot basket because buildup there can also affect system performance.
• If the pressure still seems off after those checks, you should contact a licensed pool professional for a closer inspection.

Yes, you can use aftermarket replacement Pentair cartridge pool filters as long as they come from a trusted manufacturer like UNICEL.

If you’re trying to find a compatible replacement, we have the UNICEL Product Cross Reference Guide to help match your Pentair filter cartridge with the correct non-OEM option.

Yes, since servicing Pentair cartridge pool filters must be done carefully. Only pool professionals are familiar with the correct procedures and safety steps, and that’s why many pool owners prefer to call them to replace and maintain their filters.

If you decide to replace the cartridge yourself, make sure you follow the instructions in your Pentair filter manual closely. You can also contact Pentair customer support if you need help during the process.

The gauge can help you monitor how hard the filtration system is working. On Pentair systems like the Clean & Clear Plus Cartridge Filter, you should clean the cartridges when the pressure reaches about 10 PSI above the normal starting pressure, which usually means that the cartridges have collected enough debris to slow water flow.

You should check whether a steady stream of water appears. If there’s none within 30 seconds, there could be a problem with the installation or circulation.

You should also look for leaks around the filter housing, especially where the two halves connect. If you notice leaks or poor water flow, shut the pump off right away and inspect the system before running it again.