What Is Reverse Osmosis?
If a choice had to be made, the Ultra-filtration/Reverse Osmosis process would be elected as state-of-the-art in water treatment technology today. Reverse Osmosis (RO for short) was developed in the late 1950's under U.S. government funding, as an economical method of desalinating sea water - a dream long sought after by mankind.

Reverse Osmosis is revolutionary because it uses a completely new mechanism for processing water - the semi-permeable membrane. Surprisingly enough, it looks a lot like common household sandwich wrap and is composed of very similar polymers (plastics). That's where the similarity ends because this near miracle material is now considered one of the greatest technological achievements of our century.

It's best to look at the semi-permeable RO membrane as providing two distinct water treatment processes. First, it is the ultimate mechanical filter, or ultra-filter, straining out virtually all particulate matter, turbidity, bacteria, microorganisms, asbestos - even single molecules of the heavier organics. To appreciate the fineness of this ultra-filter, as it is referred to in the industry, its pores are on the order of .0005 microns or .0000002 (two ten-millionths) of an inch! That's smaller than can be seen by the best optical microscopes.

Second, it removes dissolved impurities (e.g. mineral salts, toxic metals) - those even smaller than the water molecules themselves - by a remarkable phenomenon known as Reverse Osmosis. With RO, the membrane is said to reject these impurities by repelling them from its surface. It is however permeable to the water molecules so that they diffuse through in a pure state and collect on the opposite side to make the product water.

Overview of Advanced Reverse Osmosis Products:

Residential Products	Model Name GPD  (gallons/day)	Price	Minimum Home Pressure	Description
Click on pictures for details	RO-45     Standard 36-45* GPD	regular $385 Sale $299	Standard tap water pressure  40 psi	Our most popular drinking water system! 5-stage Ultra Reverse Osmosis System perfect for average homes (1-6 people) on municipal water.  Fully automated, highest quality, ultra durable, low maintenance, fits snugly under sink.
	RO-90     High Flow 75-90 GPD	regular $425 Sale $339	Standard tap water pressure  40 psi	A higher flow 5-stage Ultra Reverse Osmosis system for larger homes, small offices (6-10 people) on municipal water.  Fills up storage tank twice as fast as the Standard 45 gpd system.
	RO-Perm Low Pressure 45-90 GPD	regular $485 Sale $399	Lower tap water & well water pressure  30 psi	When you have low water pressure (30-50 psi) or want to upgrade performance. Suits city-water & well-water homes and international customers. 5-stage Ultra RO System comes with a non-electrical permeate pump, saves 4 times more on waste water & fills tank up to 5 times faster.
	RO-Pump Extremely Low Pressure 36-45 GPD	regular $525 Sale $439	Extreme low (international & well water) pressure  0-30 psi	For very low or no water pressure (0-30 psi) applications. Booster-pump operated, commonly used by overseas customers whose city water provides low or no pressure.
	RO-Ctop Countertop 75-90 GPD	regular $355 Sale $259	Lower tap water pressure  35 psi	A dream system for mobile people!  Light weight, portable, no installation, complete 4-stage Ultra RO, manual shut-off allows user to store as much water as needed in any container. Hook up to any faucet.