Frequently Asked Questions


I can't find my cartridge on the web site, what can I do?

Manufacturers are constantly changing the way their filters, pools and spas are made. Even though we regularly update our product listings, sometimes a cartridge might slip through the cracks. If you don’t see your filter listed, just give us the dimensions and we will find the perfect replacement for you. We carry hundreds of filter cartridges for virtually every filter system available.

How often should I replace my filter?

The most obvious way to determine when it’s time to replace your filter is the quality of your water. However, even if your water is clear, it might still be time to change your cartridge. An effective way to determine the effectiveness of your pool filter cartridge is your filter’s pressure indicator. This is usually a gauge or meter that is on the outside of your filter housing. This gauge will also show you the maximum pressure at which your filter should operate. Be certain that your filter does not exceed this pressure. As your cartridge begins to accumulate dirt and debris it becomes more difficult for the pump to circulate water through the filter. As a result, the pressure on your filter system increases and less water is circulated through your system. Not only does this increase the workload on your pump, it also reduces the quantity of water that is filtered. This leaves more dirt and debris in your pool. Most cartridge filters run at a lower pressure than sand or DE.

How Does A Cartridge Filter Work?

Swimming pool filter cartridges work by allowing water to pass through a very fine filter surface. This filter surface captures any impurities that attempt to pass through and hold them until you clean the filter cartridge or replace it. Cartridge filters have more surface area than sand filters. This allows for fewer clogs and much easier maintenance. Cartridge filters also operate at a much lower pressure than sand. This causes less backpressure on the pump so you have a greater flow of water through the system. The swimming pool filter cartridges can filter out anything down to 5 to 10 microns in size. To put this in perspective, a single grain of table salt is about 90 microns in size. Anything below 35 microns is invisible to the naked eye. Swimming pool filter cartridges are extremely popular because they are very easy to maintain and relatively inexpensive. Basic cartridge maintenance can be performed by simply rinsing off your cartridge with a garden hose or soaking them in detergent. However, the best way to ensure a clean and sparkling pool is to just simply replace them.

What if I order the wrong cartridge?

We do everything possible to make sure that you get the right filter the first time. If for some reason you don’t, let us know and we will do everything possible to make it right.

I'm a pool and spa dealer, can I purchase filters and have them shipped directly to my customers?

Yes, we can ship our cartridges to whomever you list in the “Ship To” field.

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