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how to backwash a pool filter

Author: Poolking - Swimming Pool Equipment Manufacturer

How to Backwash a Pool Filter: A Comprehensive Guide

When you own a pool, it's essential to maintain the quality of the water. One of the most crucial aspects of pool maintenance is cleaning the pool filter. A pool filter removes impurities and debris from the water, ensuring that the pH levels are balanced, and the pool water is clear and safe to swim in. While a pool filter keeps the pool water clean, it needs to be cleaned as well. In this article, we'll show you how to backwash a pool filter and keep it in great working condition.

Subheading 1: Understanding Pool Filters

Before we dive into the specifics of backwashing a pool filter, it's essential to have a basic understanding of the different types of pool filters. There are three types of pool filters: sand filters, cartridge filters, and Diatomaceous Earth (DE) filters. Each filter has its unique way of cleaning pool water.

Sand filters are the most commonly used type of pool filter. They use sand as the filter medium to capture debris and impurities. Cartridge filters use a cartridge that captures debris and impurities as the pool water passes through it. DE filters also use a filter medium, which is made of the remains of microscopic animals called diatoms.

Subheading 2: Signs it May Be Time to Backwash

Over time, the filter media in a pool filter will become clogged with debris and impurities. When this happens, the filter becomes less effective at cleaning the pool water. To ensure that your pool filter is always working correctly, you need to backwash it. Here are some signs that it may be time to backwash your pool filter:

-The pool water is cloudy.

-The water flow rate from the pool jets is low.

-You can see sediment in the pool water.

-The filter pressure gauge reads higher than normal.

Subheading 3: How to Backwash a Sand Filter

The process of backwashing a sand filter is relatively simple. Here are the steps to follow:

1. Turn off the pool pump.

2. Turn the multiport valve to the "backwash" position.

3. Turn the pool pump back on.

4. Let the filter run for a few minutes or until the water coming out of the backwash hose is clear.

5. Turn off the pool pump.

6. Turn the multiport valve to the "rinse" position.

7. Turn the pool pump back on.

8. Let the filter run for a few minutes or until the water coming out of the backwash hose is clear.

9. Turn off the pool pump.

10. Turn the multiport valve to the "filter" position.

11. Turn the pool pump back on.

Subheading 4: How to Backwash a Cartridge Filter

Backwashing a cartridge filter is a little different from backwashing a sand filter. Here are the steps to follow:

1. Turn off the pool pump.

2. Take out the cartridge filter.

3. Use a hose to blast any loose debris off the cartridge filter.

4. Flip the cartridge filter upside down.

5. Use a hose to rinse the cartridge.

6. Place the cartridge filter back in the housing.

7. Turn the pool pump back on.

Subheading 5: How to Backwash a DE Filter

Backwashing a DE filter is similar to backwashing a sand filter. Here are the steps to follow:

1. Turn off the pool pump.

2. Turn the multiport valve to the "backwash" position.

3. Turn the pool pump back on.

4. Let the filter run for a few minutes or until the water coming out of the backwash hose is clear.

5. Turn off the pool pump.

6. Turn the multiport valve to the "rinse" position.

7. Turn the pool pump back on.

8. Let the filter run for a few minutes or until the water coming out of the backwash hose is clear.

9. Turn off the pool pump.

10. Turn the multiport valve to the "filter" position.

11. Turn the pool pump back on.

Conclusion:

Maintaining a clean pool is vital to good health and family fun. In this article, we've shown you how to backwash a pool filter. While the above steps may seem complicated, they are essential for maintaining the quality of the pool water. By following the process, you can ensure that your pool filter is always in great working condition, and your family can enjoy a fun and safe swimming experience.

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----It is best to replace the silica sand of sand filters every 1-2 years for the following reasons:
a During backwashing, the filtration bed volume will expand upwards by 1.2 to 1.3 times. The water flow will drive the filtration layer to flow up and down, causing the filtration material particles to collide with each other. Backwash will let the small sand evacuate.
b.Some silica sands will be welded when the acid and alkali are changed due to insufficient purity;
Therefore, the longer the time, the worse the filtering effect of the sand tank. Since backwashing will consume and take away some sand, we need to replace the sand in the sand tank within the specified period.
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