PureH20 Water Filter Hose with Pre-Sediment Filter is a component part for current users of the PureH20 Water Filtration System. The Water Filter Hose with Pre-Sediment Filter is a replacement part, and includes the hose attachment and three pre-sediment replacement filters. Sediment levels vary throughout the country. Pre-sediment filters should be changed out every 2-4 weeks or when filter turns brown.