Swimming Pool Filter - The Importance Of Pool Water Filters

A swimming pool filter can be either a pressure or vacuum type of filter. The media for these type of pool filters are made of either...

  • Silica sand.
  • Cartridge refills.
  • Diatomaceous earth.

These are the type of filter media that are the most commonly used ones in the swimming pool and spa industry today. A pressure type pool filter is a closed tank that is located or installed downstream from the pool circulation pump and it is inline with the water flow.

The output head pressure of the pool pump is the force that is used to drive the water through the pool filters.

As the water is forced through the pool filters, the suspended particles are trapped in the media of the filters.

Subsequently as the swimming pool filter media gets packed with the suspended particles, the influent pressure (water coming into the filters) increases. As a result of the increased in influent pressure, the effluent pressure (water exiting the filters) is reduced.

Vacuum pool filters on the other hand are placed before the pool circulation pump. This type of swimming pool filter is normally set up or installed where they are openly exposed to the atmosphere.

The suction side of the pool pump creates the force that will actually pull the untreated water through the filter media. As the media of the filters trap the suspended particles, the vacuum pressure is increased causing a reduction in water flow.

Swimming Pool Filter of a Different Type

Generally the purpose of all pool filters as we can see, is to clean the water from your swimming pool or spa through filtration. This is achieve by forcing the water mechanically through the media of the swimming pool and spa filters.

When an engineer decides on a type pool or spa filter for a particular system, they must take into consideration the space and the budget of you, the client.

Some of the swimming pool filters that they normally choose from when constructing a new mechanical system include...

  • Sand filters. This type of swimming pool filter is considered the oldest type used for swimming pool filtration. Sand pool filters are deem permanent pool filters because their media last for a very long time. This time period could be anywhere from 5 to 15 years before the silica sand has to be replaced.

    The principle operation of all pool sand filters are basically the same.

    Water is forced from the top to the bottom of the filters.

    The sand filter media traps the suspended water particles as the water passes through the media.

    As suspended water particles attached themselves to the edge of the fine silica sand, they cause the gap between each of the sand grain to become smaller and smaller. As a result of this, the smaller particles such as body waste, lotions, hair, and dirt are trapped in the sand media.

    This process creates a fibrous maze that eventually filter out the smallest particles in the water. Unfortunately this process also has some down falls. This causes a pressure build up in the pool filters and a reduction in water flow.

    This is an indication that your pool filters have to be backwashed or cleaned.

  • Cartridge filters. These type of pool filters are considered replacement type filters simply because of the type of media that they carry.

    A cartridge pool filter is normally operated in the pressure mode; however, there are some cases where they have been installed or used as vacuum pool filters as well.

    Designed engineers normally choose these types of swimming pool water filters because they do not require a lot of space for installation.

  • Automatic pool cleaners These cleaners act as another form of pool filter as well. Many of these pool robots have a filtering efficiency of 2 microns which is about the same as a DE filter.

    This means as your swimming pool is being cleaned, the water is also being properly filtered.

The filtration of your swimming pool water is extremely important because of serious water contamination. If you don't have a good pool or spa filtration system, you asking for trouble. Keeping your family or guest healthy during the use of your swimming pool or spa, really depends on a properly installed swimming pool filter.

A swimming pool filter has to have the right filter media for the job that it has to do!

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