Sand Filtration Results in a Sparkling, Clean Swimming Pool   

by Pool Builders on 11-07-2011 in Articles

People who own and maintain swimming pools know that there's a lot of work and expense involved. One older lady I know purchased a lovely home complete with lavish swimming pool and promptly had the pool removed and filled in, because she didn't want the hassle of trying to maintain it. However, if you have a pool and plan to keep it, or you move into a property that has one, you will need to learn all there is to know about upkeep in order to keep your investment clean and usable. Filtration of the water is a key element to pool maintenance, and there are three different kinds you can choose from. Sand filters are one of the most effective choices you can make.

There are many benefits to choosing sand filtration. These filters are inexpensive, easy to clean, very efficient, and can last as long as 7 years before needing replacement. The sand you know best on beaches and in your child's sandbox isn't the same as the sand used for filtration. A special grade of #20 sand is employed in the filters. Large fiberglass, metal, or concrete tanks are filled with this special type of sand. Gravity moves the water into the tank through an opening in the top, filters it through the sand layer, and then pulls it back out into the pool through a hole and pipes in the bottom of the tank.

The sand removes debris and dirt which are in the water making if safe and clean again. Although sand particles are only 40 - 45 mm in size, they have sharp edges which catch debris as it passes through. Amazingly, this type of filter improves with use. During the first days after its installation, it will only be capable of trapping larger particles, but as it becomes more clogged with these large contaminants, it will become more and more able to trap tinier bits of debris. The reason that the sand will eventually need to be replaced is because over time all of the water passing through the filter will smooth the sharp edges.

Occasionally it will be necessary for you to backwash the filter. This is a reverse process that cleanses the sand of many of the particulates that are clogging it so that it will be free to capture more debris. With moderate pool usage, you'll need to backwash the filter every two to three weeks. With heavy usage, it will need to be done more often. Also with heavier use, you will want to completely change the sand within 3 to 5 years, but it is not very expensive to do so. Overall you will find sand filtration will produce plenty of clean water without a lot of maintenance and expense.

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