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how to choose a pool filter

Author: PoolKing - Pool Sand Filter Manufacturers

How to Choose a Pool Filter

When it comes to owning a pool, having clean and clear water is paramount. A functioning pool filter is a key component in maintaining this. With so many options on the market, it can be overwhelming to decide which is the best for your particular pool. In this article, we will discuss the different types of pool filters available and what to consider when making your choice.

Types of Pool Filters

There are three main types of pool filters: sand, cartridge, and DE (diatomaceous earth). Each has its pros and cons, so let's break down the differences.

Sand Filters

Sand filters rely on a bed of sand to sift out debris from your pool water. Water is pumped through the sand, where it catches dirt and particles, and clean water is returned to the pool. These filters are easy to operate and relatively low maintenance, but they do require occasional backflushing to clean out the sand. Sand filters are best for residential pools as they are less expensive than other options.

Cartridge Filters

Cartridge filters use a pleated cartridge to trap debris as it passes through the filter. These filters are known for their ability to capture particles as small as 10 microns, making them a popular choice among pool owners. They are also low maintenance and straightforward to clean. Cartridge filters are best for smaller pools as they require more frequent cleaning and can become clogged with larger pools.

DE Filters

DE filters use a combination of grids and a powder-like substance made from fossilized diatoms to trap debris. These filters are the most efficient at filtering out smaller particles, making them a popular choice for public pools and spas. However, they require more frequent maintenance as the diatomaceous earth must be replaced regularly. DE filters are also the most expensive option.

What to Consider

Now that you know the different types of pool filters, it's time to consider what will work best for your particular pool. Here are some factors to consider.

Pool Size

The size of your pool will play a significant factor in choosing a pool filter. A larger pool will require a more significant filter to keep the water clean effectively.

Pool Usage

Consider how much you use your pool. If it's used frequently, you'll want a filter that can handle the strain of filtering out more debris.

Budget

Pool filters range in price, so you'll want to consider how much you're willing to spend. Remember, the initial investment may be higher for some filters, but the long-term maintenance costs may be less.

Maintenance

Some pool filter types will require more maintenance than others. Consider how much time and effort you're willing to put into maintaining your filter.

Ease of Use

Finally, it's important to consider how easy the filter is to use. Will you need to hire a professional to install it? Is it easy to clean? Consider your level of pool maintenance expertise when choosing a filter.

Conclusion

Choosing the right pool filter is an important decision that will affect the cleanliness and clarity of your pool water. By considering your pool size, usage, budget, maintenance needs, and ease of use, you can make an informed decision on which type of filter will work best for you. Whether you choose a sand, cartridge, or DE filter, remember to follow the manufacturer's directions and perform regular maintenance to keep your pool water sparkling clean.

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----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.
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 .
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