Manual Air Relief Cap
Strike3

Manual Air Relief Cap

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  • The oldest and most popular method of filtration is sand.
  • When in the filtration mode, water always flows from top to bottom
  • They all have some sort of lateral or under drain with slots to hold back sand while allowing clean, filtered water to pass through.
  • High-rate sand filters use a special filter sand, normally 0.45 to 0.55mm (also known as pool-grade #20 silica sand), because it has sharp edges that serve to separate particles, allowing filtration to take place.
  • They operate on the basis of 'depth' filtration; dirt is driven through the sand bed and trapped in the minute spaces between the particle of sand.
  • Initially, a clean sand bed will remove larger particles, and then, as the bed starts to load up, it will remove finer particles.
  • Cleaning of the media, or sand bed, is accomplished through reversing the flow through the filter, to the 'waste' line.
  • This is known as backwashing.
- SKU: ZX9BAYST2547
Current price is $9.79
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