A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents for purposes such as providing agricultural irrigation accessible drinking water. Public and private aquaria and the safe use of ponds and swimming pools a filter can potentially remove particles much smaller than the holes through which its water passes. Point-of-use filters for commercial and industrial include granular-activated carbon filters (GAC) used for carbon filtering depth filter, micro porous ceramic filters, carbon block resin (CBR), microfiltration and ultra filtration membranes. Some filters use more than one filtration method. An example of this is a multi-barrier system. Jug filters can be used for small quantities of drinking water. Some kettles have built-in filters, primarily to reduce lime scale buildup.

Filtrex solutions have huge range of water filtration & purification cartiages from 0.2 micron to 10 micron.