how to remove the sand from a pool filter

Author: PoolKing - Pool Sand Filter Manufacturers

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Sand in the pool can be a pesky problem, clogging up filters and making the water cloudy and unpleasant to swim in. While some sand is acceptable in a sand filter, too much of it can reduce its efficiency and lifespan, and cause backwashing and other complications. Therefore, it's important to know how to remove the sand from a pool filter when necessary. In this article, we will provide a step-by-step guide on how to do that, along with some tips and precautions.

Understanding Your Pool Filter System

Before we jump into the process of removing sand from a pool filter, let's take a brief look at how the filter system works. There are three main types of pool filters: sand filters, cartridge filters, and diatomaceous earth (DE) filters. Sand filters are the most commonly used type, as they are affordable, easy to maintain, and effective at removing debris from the water.

A sand filter consists of a tank filled with special filter sand (usually silica) that traps particles as the water passes through it. The sand is cleaned by backwashing, which reverses the flow of water and flushes out the accumulated dirt. Over time, however, some sand may escape the filter and enter the pool, especially if the sand bed is old or damaged. To avoid this issue, you should replace the sand every 5-7 years, or when the pressure gauge on the filter rises above the normal range.

Preparing for Sand Removal

To remove the sand from a pool filter, you will need some tools and materials, such as a screwdriver, pliers, a shop vac, a hose, a bucket, and new sand (if you're replacing the old one). Make sure you have enough space to work around the filter and safely dispose of the sand, as it can be heavy and dusty. Wear protective gear, such as goggles, gloves, and a mask, to avoid inhaling or getting the sand into your eyes or skin.

Disconnecting and Opening the Filter

The first step in removing sand from a pool filter is to turn off the pump and electrical supply to the filter. Next, you will need to disconnect the plumbing that connects the filter to the pool and the pump. Use a screwdriver and pliers to loosen the clamps or bolts that secure the pipes, and gently twist and pull them apart. Be careful not to damage the pipes or the fittings.

Once the plumbing is detached, you can proceed to open the filter tank. This may vary depending on the model and brand of your filter, but usually involves removing the cover or lid that seals the tank. Some covers have screws or bolts that you need to unscrew or loosen, while others may have a hinge or a latch that allows you to lift the cover off. If you're not sure how to open the filter, consult the manual or contact the manufacturer.

Emptying and Cleaning the Sand

Now that you have access to the sand bed, you can begin to empty it. Use a shop vac or a scoop to remove as much sand as possible from the filter tank. You can also use the hose to rinse the sand bed and flush out any remaining sand or debris. Be careful not to damage the laterals, which are the small pipes that distribute the water evenly across the sand bed. If the laterals are damaged, you may need to replace them too.

Once the sand is removed, you can clean the inside of the filter tank with a brush or a cloth. Make sure to remove any dirt, algae, or scale that may have accumulated on the walls or the base of the tank. You can also inspect the tank for cracks, leaks, or other damages that may require repair or replacement. If the tank is in good condition, you can proceed to add the new sand.

Replacing and Closing the Filter

To add the new sand to the filter tank, pour it slowly and evenly through the opening, using a funnel or a bag to prevent spillage. The amount of sand needed depends on the size and type of your filter, but typically ranges from 100 to 600 pounds. Check the manual or consult a professional if you're not sure how much sand to use.

Once the sand is added, you can replace the cover or lid of the filter tank. Make sure it is secured properly and tightened evenly, to avoid leaks or damage. Reconnect the plumbing to the pool and the pump, following the same steps as before. Finally, turn on the pump and check the pressure gauge on the filter, which should be within the normal range. Congratulations, you have successfully removed the sand from your pool filter and restored its efficiency and clarity!

Conclusion

Removing sand from a pool filter may seem like a daunting task, but with the right tools and knowledge, it can be done easily and safely. Remember to wear protective gear, disconnect the pump and electrical supply, open the filter tank, empty and clean the sand bed, inspect the tank for damages, add new sand, and close the filter tank properly. By following these steps, you can maintain a clean and inviting pool for yourself and your guests to enjoy.