what size pool filter for 1.5 hp pump

The filter system is an essential part of any pool setup. It ensures that the water is free from debris and other impurities that can make swimming unpleasant or unsafe. The size of the pool filter you need depends on the size of your pool and the horsepower of your pump. In this article, we will discuss what size pool filter is best for a 1.5 horsepower (hp) pump.

Understanding Pool Filters

Pool filters come in three types: sand filters, diatomaceous earth (DE) filters, and cartridge filters. Sand filters are the most popular and are often used in residential pools. DE filters are the most efficient and are ideal for pools with heavy debris, such as leaves, insects, and dirt. Cartridge filters require less maintenance and are suitable for pools with light debris.

Factors to Consider

When calculating the size of your pool filter, you need to consider the pump size, pool size, and type of filter you have. For a 1.5 hp pump, you should have a filter that can handle up to 90 GPM (gallons per minute) of water flow. You also need to consider the pool size, which is expressed in gallons. A small pool of 5,000 gallons will need a smaller filter than a larger pool of 20,000 gallons.

Determining the Pool Size

To calculate the size of your pool, you need to measure the length, width, and depth of your pool. These measurements will help you determine the pool's volume in gallons. To calculate the pool's volume, use this formula: Pool length (ft.) x pool width (ft.) x pool average depth (ft.) x 7.5 = pool volume (gallons).

Calculating Pool Filter Size

Once you determine your pool's size, you will need to calculate the appropriate pool filter size. The general rule of thumb is to choose a pool filter that can handle at least one and a half times your pool's size in gallons. For example, if your pool is 20,000 gallons, then you should choose a filter that can handle at least 30,000 gallons.

Maintaining the Filter System

Maintaining your pool filter system is crucial to ensuring its longevity and efficiency. Regardless of the type of filter you have, it is recommended that you backwash or clean it at least once a week. This will remove any dirt or debris that has accumulated in the filter.

Another important maintenance tip is to regularly check the pressure gauge on your filter. A dirty filter will cause the pressure to increase, which can damage the filter and reduce its efficiency. If the pressure gauge reads 10 or more psi above the starting pressure, it's time to backwash or clean the filter.

Conclusion

Choosing the correct pool filter size is critical to the efficiency and longevity of your pool filtration system. For a 1.5 hp pump, choose a filter that can handle up to 90 GPM. Additionally, calculate the size of your pool and choose a filter that can handle at least one and a half times your pool's size in gallons. Proper maintenance of your pool filter system is also essential to ensure its longevity and efficiency. Backwash or clean your filter at least once a week and regularly check the pressure gauge to avoid damaging the filter.