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Reverse Osmosis Systems

Brands

Gold Line Reverse Osmosis, PuROTwist Reverse osmosis, and Commercial RO systems
Good Water Warehouse
Hydrotech Reverse Osmosis Systems
Hydrotech
Isopure Water Reverse Osmosis Systems
IPW Industries Inc
Replacement Pentek Filters
Pentek
Pure Reverse Osmosis Systems
Puregen
Pureteck, PureT Reverse Osmosis Systems
PureT
Watts Reverse Osmosis Systems
Watts
 

How reverse osmosis systems work?

No Flash

LEGEND
Dark Green Feed water
Purple Waste
Yellow Tank line
Light Green Product

As feed water (dark green) enters the first three housings, it will typically get filtered through a sediment filter to prevent clogging, and carbon filters to remove organic contaminants as well as chlorine, bad taste and odor.

Once the pre-filtration has completed, the water passes through the reverse osmosis membrane. High water pressure is typically needed to force the water to pass through the tiny sub-micron pores. Since not all the water can pass through the membrane, it will create waste water which flows down the drain (purple).

As water slowly gets enough pressure to push through the membrane, it will eventually start filling the tank line (yellow). Once the tank fills, it will turn the system off once the pressure equalizes in the hydraulic shut off valve - not seen.

When water is demanded at the faucet, water is drawn from the tank and flow is reversed through the tank line (yellow) and passes through the post filter and up the faucet line (light green).

The system then repeats as needed.

What Reverse Osmosis Removes?

Below are the typical rejection (removal) percentages of a standard thin film (TFC) reverse osmosis membrane. These are averages based on experience and are generally accepted within the industry. They are not a guarantee of performance. Actual rejection can vary according to the chemistry of the water, temperature, pressure, pH and other factors.


Estimated Reverse Osmosis Rejection Percentages

The reverse osmosis process uses a semi-permeable membrane to reject a wide variety of impurities. Here is a partial list. Permeate flow and salt rejection based on the following test conditions: 250 ppm softened tap water, 77F (25C), 15% recovery and the specified applied pressure of 50 psi; Minimum salt rejection is 97%;Permeate flows may vary +/-20%.


Aluminum 97-98% Nickel 97-99%
Ammonium 85-95% Nitrate 93-96%
Arsenic 94-96% Phosphate 99+%
Bacteria 99+% Polyphosphate 98-99%
Bicarbonate 95-96% Potassium 92%
Boron 50-70% Pyrogen 99+%
Bromide 93-96% Radioactivity 95-98%
Cadmium 96-98% Radium 97%
Calcium 96-98% Selenium 97%
Chloride 94-95% Silica 85-90%
Chromate 90-98% Silicate 95-97%
Chromium 96-98% Silver 95-97%
Copper 97-99% Sodium 92-98%
Cyanide 90-95% Sulphate 99+%
Ferrocyanide 98-99% Sulphite 96-98%
Fluoride 94-96% Zinc 98-99%
Iron 98-99%

Lead 96-98% Insecticides 97%
Magnesium 96-98% Detergents 97%
Manganese 96-98% Herbicides 97%
Mercury 96-98% Virus 99+%
TDS (Total Dissolved Solids) 95-99% Hardness 93-97%

Figures given above are not actual test figures, but are manufacturer estimates of normal TFC membrane performance.
Products (Total Items: 36)
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Hydrotech (1340302-60) QCRO4V-50 Pura Quick-Change 50 GPD Reverse Osmosis Water Filter System
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$289.99
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GWW (GOLDLINE-50) Goldline 5 Stage Reverse Osmosis System - 50 GPD
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$259.00
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Watts (501026) ZeroWaste Retrofit Kit
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$194.95
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Isopure Water (ISO-RO6ALK) 6 Stage Alkaline Reverse Osmosis System 50 GPD
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$499.99
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Watts (FMRO4-MAN) 4 Stage 50 GPD Reverse Osmosis System with Metal Tank
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$229.99
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Watts Premier (531411) RO PURE RO-4 Reverse Osmosis 50 GPD System
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Watts (WQC4RO11-50MTNF) 4 Stage KWIK CHANGE RO System 50 GPD w/ Metal Tank
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$279.99
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Watts (WQC4RO11-50PTNF) 4 Stage KWIK CHANGE RO System 50 GPD w/ Plastic Tank
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$289.99
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Watts (WQC4RO13-100MT) 4 Stage KWIK CHANGE RO System 100 GPD w/ Metal Tank
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$309.99
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Watts (WQC4RO13-100PT) 4 Stage KWIK CHANGE RO System 100 GPD w/ Plastic Tank
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$319.99
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Pentek (161013) 3-Stage RO-3500 Monitored Reverse Osmosis System
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$279.99
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