how to size a cartridge pool filter

Author: PoolKing - Pool Sand Filter Manufacturers

How to Size a Cartridge Pool Filter:

When it comes to maintaining a swimming pool, one of the most important factors to consider is the filtration system. A properly sized filter will ensure that the pool water stays crystal clear while minimizing the need for frequent maintenance. In this article, we’ll take a look at how to size a cartridge pool filter for your pool.

1. Determine Your Pool Size

Before choosing a filter, it’s important to determine the size of your pool. To do so, you’ll need to know the length, width, and average depth of your pool. Once you have this information, you can use an online pool volume calculator to determine the total gallonage of your pool.

2. Calculate Your Pool’s Turnover Rate

The turnover rate of your pool refers to how many times your entire pool volume is circulated through your filter system in a given day. The industry standard turnover rate for a residential swimming pool is once every 8 hours. To calculate your pool’s required flow rate, divide your pool volume by 8.

For example, if your pool has a volume of 20,000 gallons, you would need a flow rate of 2,500 gallons per hour to maintain a once-per-day turnover rate

3. Choose a Cartridge Filter Size

Once you have determined your required flow rate, you can choose the appropriate size cartridge filter. Cartridge filters are sized based on their flow rate, measured in gallons per minute (GPM).

Most manufacturers will list the maximum GPM rating for their cartridge filters. To choose the appropriate size filter for your pool, select a filter with a maximum GPM rating that is equal to or higher than your required flow rate.

4. Consider the Filter Material

Choosing the right filter material is crucial to ensure efficient filtration performance. The most common materials used for cartridge filters are polyester and pleated paper.

Polyester filters are typically better suited for pools with high levels of debris, as they have a larger surface area and can hold more debris before needing to be cleaned.

Pleated paper filters are usually more effective at filtering out finer particles and can offer a longer lifespan with the proper maintenance.

Ultimately, the choice of filter material will depend on the specific needs of your pool.

5. Install Your Cartridge Filter

Once you have chosen the appropriate cartridge filter for your pool, it’s time to install it. Follow the manufacturer’s instructions carefully to ensure proper installation and operation.

It’s important to note that cartridge filters require regular cleaning to maintain a proper flow rate and filtration performance. Plan on cleaning the filter every 4-6 weeks or as needed, depending on the level of debris in your pool.

In Conclusion

Choosing the right size cartridge filter for your pool can seem overwhelming, but by following these steps, you can ensure that your pool stays sparkling clean all season long. Remember to calculate your pool’s turnover rate, choose the appropriate filter size and material, and follow proper maintenance procedures to keep your filter operating at optimal performance.