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how to acid wash a pool filter

Author: Poolking - Swimming Pool Equipment Manufacturer

How to Acid Wash a Pool Filter: A Step-by-Step Guide

If you’re a pool owner, you know the importance of maintaining clean and clear water. However, even with a proper cleaning schedule, over time, your pool filter can become clogged with dirt, bacteria, and other contaminants. This can cause your filter to work less efficiently, leading to poor water quality and potentially costly repairs.

One way to combat this issue is by performing an acid wash on your pool filter. This deep-cleaning technique involves using a mild acid solution to dissolve and remove built-up debris from your filter. In this article, we’ll go over the steps you need to take to acid wash your pool filter effectively.

Safety First

Before we begin, it’s essential to note that acid washing can be dangerous, so it’s important to approach this task with the utmost care. Be sure to wear protective gear, including gloves, goggles, and a face mask, to avoid contact with the acid. Additionally, make sure to work in a well-ventilated area and keep children and pets away from the pool during this process.

Step 1: Turn Off the Pool Equipment

Start by turning off your pool equipment, including the pump, filter, and any other devices that connect to the pool. This will ensure that no water is flowing through the system and will prevent damage during the cleaning process.

Step 2: Remove the Pool Filter

Next, remove the pool filter from its housing. Depending on the type of filter you have, this may involve unclamping or unscrewing the filter housing or disassembling the filter itself. Refer to your pool manual if you need assistance with this step.

Step 3: Prepare the Acid Solution

Once the filter is removed, it’s time to prepare the acid solution. You’ll need to dilute a mild acid, such as muriatic acid, with water, following the manufacturer’s instructions. Typically, one gallon of acid will be sufficient for a standard-sized pool filter.

Step 4: Soak the Filter

Place the pool filter in a large container, such as a plastic storage bin or a garbage can, and pour the acid solution over the filter until it is fully submerged. Allow the filter to soak for approximately 10 to 15 minutes, or as instructed by the manufacturer.

Step 5: Rinse the Filter

After the filter has soaked, carefully rinse it with a hose, removing any remaining acid and debris from the filter. Be sure to rinse the filter thoroughly to ensure the acid solution is completely removed.

Step 6: Reassemble and Install the Filter

Once the filter is fully rinsed, it’s time to reassemble and reinstall it into the filter housing. Follow the manufacturer’s instructions for your specific filter type to ensure proper installation.

Step 7: Turn On the Pool Equipment

Finally, turn on your pool equipment and let the system run for a few minutes to ensure that the filter is functioning correctly. It’s also a good idea to check your pool water chemistry to ensure that it’s balanced and ready for swimming.

Conclusion

Acid washing your pool filter can be a beneficial tool to keep your pool water clean and clear. By following these steps, you can perform an acid wash safely and effectively, ensuring that your pool stays in top condition. Remember to perform this process as needed, typically once per year, or more frequently if your filter is experiencing significant buildup.

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After about 5~10days ,or when the reading of the pressure gauge on the pump side of the filter has increased by about 0.2bars since the last backwash , backwash the filter as follows:
1. Stop the pump
2.Close the valves on the suction and return lines.
3.Open the cover of the pump and empty the filter gasket .
4.Refit the cover
5.Open the valve to the drain outlet
6.Turn the lever to BACKWASH
7. Open the valves to the suction and return lines.
8.Start the pump .Rinse the filter for about 1 to 2 minutes until the water in the sight glass is clear .
NOTE : Any electric heater must be off .
9. Stop the pump
10. Turn the lever to RINSE , start the pump and rinse for about 15~30 seconds. Stop the pump and turn the lever to FILTER . This is the normal operating position .
11. Close the drain outlet valve and start the pump . Switch on the electric heater if any .
Bigger is not always better when it comes to pool pumps. A pool pump that is too large can hinder filtration and can even damage a pool’s filter and/or heater. It is therefore very important to know the size of a pool before purchasing a pool pump. If there is additional equipment (such as water features) installed into the pool, it will have to be taken it into account when deciding what size pump is going to be purchased. The more equipment is installed into a pool, the more powerful the pump needs to be.
It is important to consult with a pool equipment expert, such as Poolking's Pumps, before buying a pool pump. The team at Poolking will be able to give our customers professional advice regarding the size of the pump they will need to purchase.
----Yes, they can. Silica sand is mainly used for filtration, while activated carbon is mainly used for adsorption. Silica sand is effective for higher water quality requirements. When use them together, silica sand should be placed on the bottom layer, and then activated carbon should be filled on the sand, but the cost of using two media is much higher.
a. Power failure or motor protection tripped
b. Pump doesn't vent
c. Pump doesn't fill the water
d. Suction line/hose leaking
e. Transparent cover not properly installed - check filter basket - even bolts
f . Inlet suction process is too large g.) Total resistance loss exceeds the allowable range of the pump - recalculate the required pressure
h. Mechanical shaft seal leakage
----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.
Poolking won well-known brand awards for consecutive 3 years
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