Unmasking the Mystery: Why is Your Pool Filter Blowing Out Sand?

Why is your pool filter blowing out sand, and how can you fix it? Find the common causes and solutions for this problem and enjoy a clean and clear pool.

If you own a swimming pool, you know how important it is to keep the water clean and clear. A pool sand filter is one of the most common and effective ways to filter out dirt, debris, and bacteria from your pool water.

However, sometimes, you may notice that your pool sand filter blows out the sand into the pool, making the water cloudy and dirty. This is unsightly and harmful to your pool equipment and your health.

Sand escaping your pool filter likely points to broken laterals, leaky connections, or worn internal components. Check the amount, appearance, and location of sand to identify the culprit, then tighten leaky points, replace damaged parts, use proper backwashing technique, or consult a pool technician for repairs. Don’t ignore it; it can harm your filter and water quality.

So, why is your pool sand filter blowing out sand, and how can you fix it? This article will answer these questions and give tips on preventing this problem from happening again. Let’s get started!

What Causes Your Pool Sand Filter to Blow Out Sand?

• Broken laterals: The small pipes at the bottom of the filter tank distribute the water evenly through the sand bed. They also prevent the sand from escaping the tank and entering the pool. If one or more laterals are cracked or broken, the sand will leak out of the filter and into the pool. This is one of the most common causes of sand blowing out of the filter.
• Damaged seals: The rubber rings connect the filter tank and the multiport valve tightly. The multiport valve is the device that controls the flow of water in and out of the filter. If the seals are worn out or broken, the water pressure will force the sand out of the tank and into the pool. The most common seal to die is the O-ring on the top of the tank.
• Too much sand in the filter: The filter tank has a specific capacity for the amount of sand it can hold. Adding too much sand to the filter will overflow the standpipe, the vertical pipe connecting the filter tank to the multiport valve. The excess sand will then be pushed out of the filter and into the pool. You should always follow the manufacturer’s instructions on how much sand to use for your filter model.
• The wrong type of sand in the filter: Not all sand is suitable for pool filters. You should only use specially graded and washed pool filter sand to remove impurities and contaminants. Pool filter sand has a uniform size and shape, which allows it to trap dirt and debris effectively. Regular sand, such as play sand or beach sand, will not filter the water properly and will clog the laterals and the standpipe. The sand will also make it easier to escape the filter and enter the pool.
• Old or dirty sand in the filter: Over time, the sand in the filter will lose its filtering ability and become clogged with dirt and debris. This will reduce the water flow and increase the pressure in the filter. The sand will also become compacted and challenging, making it difficult for the water to pass through. This will cause the sand to be forced out of the filter and into the pool. You should replace the sand in the filter every 3 to 5 years, depending on the usage and water quality.

Explore the guide: Pool Sand Filter Cleaning Tips. Uncover the secrets to crystal-clear water and elevate your pool experience.

How to Fix: Why is Your Pool Filter Blowing Out Sand?

Depending on the cause of the problem, there are different ways to prevent your pool sand filter from blowing out sand. Most common solutions:

• To replace the broken laterals, turn off the pump, drain the tank, remove the valve, and scoop out the sand. Then, unscrew the old laterals and screw in the new ones. Fill the tank with water and sand, reattach the valve, and turn on the pump.
• To replace the damaged seals, turn off the pump, drain the tank, and remove the valve. Then, inspect and remove the old seals and clean the surfaces. Then, lubricate and install the new seals. Reattach the valve and turn on the pump.
• To remove the excess sand, turn off the pump, drain the tank, and remove the valve. Then, scoop out the sand until it reaches the right level. Fill the tank with water, reattach the valve, and turn on the pump.
• To use the correct sand, turn off the pump, drain the tank, and remove the valve. Then, scoop out and dispose of the wrong sand. Fill the tank with water and pool filter sand, reattach the valve, and turn on the pump.
• To replace the old or dirty sand, turn off the pump, drain the tank, and remove the valve. Then, scoop out and dispose of the old sand. Fill the tank with water and pool filter sand, reattach the valve, and turn on the pump.

How to Prevent Your Pool Filter from Blowing Out Sand?

To prevent your pool sand filter from blowing out sand in the future, you should follow these tips:

• Check the filter monthly for cracks, leaks, or sand. Fix any problems asap.
• Backwash the filter weekly or when dirty. This removes the dirt from the sand. To do this:
  • Turn off the pump and set the valve to backwash.
  • Turn on the pump and run the water until clear.
  • Turn off the pump and set the valve to rinse.
  • Turn on the pump and run the water briefly.
  • Turn off the pump and set the valve to filter.
  • Turn on the pump and check the pressure.
• Use a pre-filter to catch the large particles before the filter. Clean and replace it regularly.
• A clarifier makes the small particles more prominent and accessible to the filter. Follow the instructions on how and when to use it.
• Use a filter cleaner to remove the oils, grease, and organic matter from the sand. Follow the instructions on how and when to use it.

How Hot Tub Patio Can Help You with Your Pool Sand Filter Problems

At Hot Tub Patio, we provide you with the best products and services for your pool and spa and valuable tips and advice on how to solve shared pool and spa problems. Whether you need to know how to balance your water chemistry, clean your filter, winterize your pool, or troubleshoot your hot tub, we have the answers for you.

For more reading about Healing with Hot Tub Patio guide or for more knowing about Pools Guide.

A Grain Of Conclusion

In conclusion, understanding the reasons behind the question, “Why is your pool filter blowing out sand?” can save pool owners from unexpected costs and maintenance stress. Remember, it primarily points towards damage in the laterals or standpipe of your filter system.

Regular checks and prompt repairs are the keys to a well-functioning sand filter and a perfect pool. When was the last time you inspected your pool sand filter?

Are you prepared to dive deep into pool maintenance and take control of your homeside oasis?