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How to Backwash an Above Ground Pool?

Published in Pool Maintenance 3 mins read

Backwashing your above ground pool filter is a crucial maintenance task. Here's how to do it correctly:

Backwashing removes accumulated debris from your pool's filter, ensuring it works efficiently. The process involves reversing the water flow to flush out the collected dirt. Here's a step-by-step guide:

Backwashing Steps:

Step Action Duration
1 Turn the pump off. Immediately
2 Turn the filter valve to the backwash setting. Immediately
3 Turn the pump back on. 1-1.5 minutes or until waste water is clear
4 Turn the pump off. Immediately
5 Turn the filter valve to the rinse setting. Immediately
6 Turn the pump on. 30 seconds
7 Turn the pump off. Immediately


The steps, detailed further below, ensure your filter is properly cleaned, allowing your pool water to remain clear and healthy.

Detailed Steps for Backwashing:

  1. Turn off the pump: Before making any changes to your filter system, always turn off the pump to avoid damage to the equipment and potential injury.

  2. Set the filter valve to 'Backwash': Locate the multiport valve on your filter. Turn the handle to the setting labeled 'Backwash'. This reverses the water flow, sending it through the filter in the opposite direction and out the waste line.

  3. Turn on the pump: After adjusting the valve, turn the pump back on. Run it for approximately 1 to 1.5 minutes. Observe the water running through the waste line; it should go from cloudy to clear.

  4. Turn off the pump again: Once the water is clear, immediately turn off the pump. This is critical to prevent backwashed debris from being re-introduced into your pool.

  5. Switch the filter valve to 'Rinse': Turn the multiport valve to the 'Rinse' setting. This setting will help settle the sand or other filter media that may have been disturbed during backwashing and also rinse any remaining dirty water out the waste line.

  6. Turn the pump back on: Run the pump for about 30 seconds on the 'Rinse' setting. This helps clear any last bits of debris.

  7. Turn off the pump and Return to Filtration: After rinsing, turn the pump off and set the valve back to the 'Filter' setting. Your filter is now clean and ready for normal operation.

Tips for Successful Backwashing:

  • Frequency: Backwash your pool filter when the pressure gauge is 8-10 PSI higher than normal.
  • Waste Line: Ensure the waste line is properly directed to a suitable drain area.
  • Check Pressure: Note the starting pressure of your filter after cleaning so you know when to backwash again.
  • Regular Maintenance: Backwashing is a regular maintenance task. A properly functioning filter ensures clear and healthy water for your pool.

By following these steps, you can easily maintain your above ground pool's filter and keep your pool clean and enjoyable.

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