how to backwash my hayward pool filter


Author: Poolking - Swimming Pool Equipment Manufacturer

The Hayward pool filter is an essential component of any swimming pool. It helps to keep the water clean, clear and free from debris. Over time, however, the filter can become clogged with dirt and debris, which will impact its efficiency. Regular maintenance is required to ensure that the filter is working at its best. Backwashing is an effective way to clean your Hayward pool filter. In this article, we will discuss how to backwash your Hayward pool filter and why it is important.

What is Backwashing?

Backwashing involves reversing the flow of water through the filter to remove built-up debris. The process sends water in the opposite direction of the normal flow, which forces the dirt and debris out of the filter and into the waste line. Backwashing is a quick and straightforward process and should be done at least once a month or as needed.

Step by Step Guide: How to Backwash your Hayward Pool Filter

Here is a step-by-step guide on how to backwash your Hayward pool filter.

Step 1: Turn off the pool pump

The first step is to turn off the pool pump to prevent any backpressure on the system. This step is crucial because operating the pump during backwashing can cause damage to the filter.

Step 2: Turn the valve position to ‘backwash’

Next, turn the valve position to ‘backwash’ on the multiport valve. The multiport valve is located on the top of the filter system, and it controls the flow of water through the filter.

Step 3: Turn the pump on

Once the valve position is set to ‘backwash,’ turn the pump on and let it run for two to three minutes. During this time, water will flow through the filter in reverse and flush out any debris trapped in the filter.

Step 4: Check the sight glass

Check the sight glass on the multiport valve to see if the water is clean. The sight glass allows you to see the water moving through the filter, and you should see clear water once debris has been removed from the filter.

Step 5: Rinse

Once the water is running clear, turn off the pump, and set the valve position to ‘rinse.’ Allow the pump to run for 30 seconds to one minute. The rinse cycle removes any remaining debris from the filter and prevents it from returning to the pool.

Step 6: Reset

Finally, once the rinse cycle is complete, turn off the pump, and set the valve position to the ‘filter’ setting. This step resets the filter for normal operation. Now your Hayward pool filter should be functioning optimally again.

Why is Backwashing Important?

Backwashing your Hayward pool filter is essential to maintain a clean pool. Over time, dirt, debris, and other contaminants can accumulate in the filter media, causing it to become clogged. When this happens, water flow is restricted, and the efficiency of the filter is reduced. Backwashing removes these contaminants, allowing your Hayward pool filter to work at its best.

Benefits of Regularly Backwashing your Hayward Pool Filter

1. Improves Water Quality: Backwashing improves water quality by removing dirt, debris, and other contaminants from the pool water. This creates a cleaner and clearer pool.

2. Increases Efficiency: A clogged filter reduces the efficiency of the pool pump, meaning it will take longer to filter the water. By backwashing regularly, you can keep the filter working efficiently, reducing the workload on the pump and ultimately, saving energy and money.

3. Extends the Life of Your Filter: Regular backwashing can extend the life of your filter by preventing clogs, which can cause damage to the filter.

4. Cost-Effective: Regular maintenance, including backwashing, is a cost-effective way to keep your pool filter functioning optimally. It is much cheaper to perform regular maintenance than to replace a faulty filter.


Regular backwashing is essential for maintaining a healthy and clean swimming pool. By following the above steps, you can quickly and effectively backwash your Hayward pool filter. Remember to do this at least once a month or as needed to achieve maximum effectiveness. With regular cleaning, you can ensure your Hayward pool filter is operating its best, leading to a cleaner and healthier pool that will be enjoyed for years to come.


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