Avid 30 Gallon Per Day Reverse Osmosis (RO) Filter
Avid, a Sterling Water Treatment Brand, delivers with a 5 Stage Reverse Osmosis (RO) filtration system capable of eliminating over 99% of contaminants in water, including virii, bacteria, cysts, pentavalent arsenic, etc.
This 30 GPD filter system comes complete with a bracket for mounting the filters under a counter or against a wall, plus a small pressure tank for filtered water storage, a saddle valve for connection, a faucet, and filter wrench.
The Five Stages
Stage One is a 5 micron filter used to remove grit, sediment, sand, etc before entering Stage Two. The longevity of the Stage One filter is dependent on the load of material being delivered by your water system - typically, anything over 5 microns is visible, so if you can see it in the water, Stage One is capturing it.
Stage Two is a granular activated carbon filtration cartridge designed to remove other solids that will bind with carbon prior to entering the more sensitive membrane. Carbon will also help to reduce chlorine levels, which can never be allowed to touch the membrane
Stage Three is an activated carbon block filter designed to remove taste/odor issues and chlorine prior to entering the membrane stage, Stage Four.
Stage Four is where the magic happens - Reverse Osmosis relies on the physics of osmosis in liquids. In Stage Four, the water builds up a higher pressure on one side of a semi-permeable membrane, in the Stage Four filter, which causes the water molecules to equalize across the membrane. However, because the holes in the membrane are so small, only water will typically (just over 99% effective, remember?) make it through the Stage Four filter.
Stage Five is a secondary carbon filtration cartridge to clean up any odors or tastes that may have made it through the system.
It is expected that filters will last approximately 6 months to a year, but it is mostly dependent on usage and water quality at your home.