How to Backwash an Above Ground Pool Sand Filter

Backwashing an above ground pool sand filter is an essential maintenance task that ensures your pool water remains clean and clear. It involves reversing the flow of water through the filter to flush out any dirt, debris, or contaminants that may have accumulated in the sand bed. Here's a step-by-step guide on how to backwash an above ground pool sand filter.

Step 1: Turn off the pool pump
Before starting the backwashing process, ensure that the pool pump is turned off. This will prevent any water from flowing into the filter during the backwashing process.

Step 2: Turn the multiport valve to the backwash position
The multiport valve is located on the top of the filter tank and is responsible for directing water flow through the filter. Turn the valve handle to the backwash position, which is usually indicated by a label or an arrow on the valve.

Step 3: Connect the backwash hose
Attach the backwash hose to the waste port on the multiport valve. The hose should be long enough to reach a suitable drainage area, such as a sewer drain or a garden.

Step 4: Turn on the pool pump
Turn on the pool pump and let it run for about 2-3 minutes. This will allow the water to flow through the filter in the reverse direction, dislodging any dirt or debris that may have accumulated in the sand bed.

Step 5: Observe the water flow
Watch the water flowing out of the backwash hose. Initially, the water may appear cloudy or dirty, but it should gradually clear up as the backwashing process continues. Continue backwashing until the water flowing out of the hose appears clear and clean.

Step 6: Turn off the pool pump
Once the water flowing out of the backwash hose is clear, turn off the pool pump.

Step 7: Turn the multiport valve to the rinse position
Turn the multiport valve handle to the rinse position. This will allow the water to flow through the filter in the normal direction, flushing out any remaining dirt or debris from the sand bed.

Step 8: Turn on the pool pump
Turn on the pool pump and let it run for about 1-2 minutes. This will flush out any remaining dirt or debris from the sand bed.

Step 9: Turn off the pool pump
Once the rinse cycle is complete, turn off the pool pump.

Step 10: Turn the multiport valve to the filter position
Turn the multiport valve handle to the filter position. This will allow the water to flow through the filter in the normal direction, and your pool is now ready to use.

In conclusion, backwashing an above ground pool sand filter is a simple process that can be done in just a few minutes. By following these simple steps, you can ensure that your pool water remains clean and clear, providing you with a safe and enjoyable swimming experience.