Product DescriptionFor use with Hydro Logic's water filtration systems. This is a replacement sediment filter for Tall Blue (HLTBL) or Tall Boy (HLTBY) units.From the ManufacturerStandard sediment pre-filter included with system. For Use with Tall Boy and Tall Blue Filtration Systems. Removes Dirt, Sand and Silt. Appropriate for Well Water and City Water.