Definitions for "SAND FILTER"
A filtration system that removes contaminants by forcing the water through a vessel of sand. These require backwashing about once a month and have no need for replacement chemicals.
uses sand to filter the pool water.
Subject: Resources & Reserves A filter for purifying domestic water, consisting of specially graded layers of aggregate and sand, through which the water flows slowly downwards. A similar type of filter is used for treating sewage effluent, but has coarser sand.[ Pics List
a basic tool water treatment
an intermediary step for the reduction of harmful, disease-causing pathogens and nutrients prior to final treatment and disposal in your drainfield
Uses sand to collect debris from water running through it.