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Home>Point of Entry Replacement Filters>Water Treatment Media > GARNET


WaterFilters.NET Garnet Water Treatment Media (50 lbs)

Sediment & Turbidity Reduction Media; High Density Lower Filtration Layer

Garnet Water Treatment Media and Garnet Water Filter Media
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Product Code: GARNET
50 Pound Bag; No Returns
  • Garnet Water Treatment Media:
  • Choose between two Garnet media particle sizes: Course #8-12 (1.5 mm) or Fine #30-40 (0.35 mm).
  • Garnet is a high hardness, high density granular filter media. It is normally used as the lower (final) filtration layer of a multi-bed down flow filtration system.
  • Garnet water filtration media is a chemically static, non-metal mineral ordinarily found in nature.
  • Garnet water treatment media is a highly dense granular mineral, its hardness, chemical, and durability properties makes Garnet a superior filter media and abrasive media.
  • Garnet filter media is used as a support bed in backwashing filters with filter medias such as Pyrolox, Calcite, Sand, Greensand or Birm.
  • An effective multi-media filter system will utilize larger sized media on top to filter out the larger particulates and smaller sized media to filter out the smaller particulates. Garnet with its high density is heavier than most other filter media. Garnet media's higher density provides stability within your dual media bed allowing the filter sized Garnet to filter down to 10 20 micron particulates.
  • In combination with other filter medias, higher flow rates, higher loading and better filtration can be achieved.
  • High hardness reduces attrition and provides for years of reliable service.
  • Garnet water treatment media is an excellent support bed for other high density medias.
  • Garnet water filter media is typically used in multi-media filters as the sub-fill or bottom layers of the filter. Although its density requires high backwash rates, combining fine mesh garnet with other media such as sand and anthracite significantly increases the filtration capacity of a system.
  • Called Multi-Media or Mixed media filtration, the high density small grain size of Garnet media solves a major filtration problem. In a single media granular filter such as a filter, the material will hydraulically classify during backwash according to granule size, the smallest rinsing to the top. When water flows downward through the sand, the fine particles at the top of the bed do most of the straining of the sediment.
  • The solids form a cake on the surface with filtration typically taking place in the top few inches. As the cake forms, the filtration becomes finer and head loss increases exponentially in time.
  • The ideal situation would be to have the large grains of media at the top to trap the large solids and uniformly decreasing grain size in the direction of fluid flow with the small grains at the bottom to do the final polishing. The penetration of the solids through the entire bed allows increased solids storage, longer filter runs and higher filtration rates.
  • A properly designed multi-media system will maintain its unique inverse void gradation and provide superior performance even after long periods of use in backwash. This stable condition of large grains above finer ones is achieved by the use of materials of different sizes and specific gravities.
  • Garnet with its high specific gravity of 4.0 forms the lower fine grain layer, its 0.3 mm effective size can filter down to the 10-20 micron range. Filter sand (e.s.= 0.5 mm) and anthracite (e.s.=0.9 mm) or filter -Ag can form the larger less dense layers.
  • For the majority of municipal and industrial water supply applications, a filter bed composed of 55% low density material, 30% medium density material, and 15% high density material is recommended. Garnet media, sized per requirements, is the ideal high density material.
  • Garnet Water Treatment Media Characteristics:
  • Color: Light tan to reddish purple
  • Bulk Density: 120 150 lbs./cu. ft.
  • Specific Gravity: 4.0 - 4.1
  • Mesh Size: #8 - #80
  • Effective Size: .20 2.5 mm
  • Uniformity Coefficient: 2.2
  • Hardness: 7.8 8.0 (Mohs scale)
  • Garnet Water Filtration Media Operational Specifications:
  • Bed depth: 3 5 in.
  • Freeboard: 40 50% of bed depth (min.)
  • Service flow rate: 3 5 gpm/sq. ft.
  • Backwash flow rate: 15 20 gpm/sq. ft.
  • Backwash expansion rate: 30% of the bed depth
  • UPC: 689466299700
  • Manufacturer: WaterFilters.NET A7080-50

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