Water Filter, Reverse Osmosis System, Reverse Osmosis Pressure Tank, Water Filtration Systems
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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, 77°F (25°C), 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 Hydrotech (1340302-60) QCRO4V-50 Pura Quick-Change 50 GPD Reverse Osmosis Water Filter System

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$289.99
Part Number: 1340302-60
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GWW (GOLDLINE-50) Goldline 5 Stage Reverse Osmosis System - 50 GPD GWW (GOLDLINE-50) Goldline 5 Stage Reverse Osmosis System - 50 GPD

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$259.00
WQA/NSF58 Certified - MADE IN THE USA
Part Number: GOLDLINE-50
Availability: Back Order
Watts (501026) ZeroWaste Retrofit Kit Watts (501026) ZeroWaste Retrofit Kit

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$194.95
Part Number: ZWKIT
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Isopure Water (ISO-RO6ALK) 6 Stage Alkaline Reverse Osmosis System 50 GPD Isopure Water (ISO-RO6ALK) 6 Stage Alkaline Reverse Osmosis System 50 GPD

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$499.99
Part Number: ISO-RO6ALK
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Watts (WQC4RO13-100PTPP) 4 Stage KWIK CHANGE RO System 100 GPD w/ Plastic Tank w/ Permeate Pump Watts (WQC4RO13-100PTPP) 4 Stage KWIK CHANGE RO System 100 GPD w/ Plastic Tank w/ Permeate Pump

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Part Number: WQC4RO13-100PTPP
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Watts (FMRO4-MAN) 4 Stage 50 GPD Reverse Osmosis System with Metal Tank Watts (FMRO4-MAN) 4 Stage 50 GPD Reverse Osmosis System with Metal Tank

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Part Number: FMRO4-MAN
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Watts Premier (531411) RO PURE RO-4 Reverse Osmosis 50 GPD System Watts Premier (531411) RO PURE RO-4 Reverse Osmosis 50 GPD System

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$269.00
Part Number: F531411
Availability: Ships within 24-72 hours
Watts (WQC4RO11-50MTNF) 4 Stage KWIK CHANGE RO System 50 GPD w/ Metal Tank Watts (WQC4RO11-50MTNF) 4 Stage KWIK CHANGE RO System 50 GPD w/ Metal Tank

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Part Number: WQC4RO11-50MTNF
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Watts (WQC4RO11-50PTNF) 4 Stage KWIK CHANGE RO System 50 GPD w/ Plastic Tank Watts (WQC4RO11-50PTNF) 4 Stage KWIK CHANGE RO System 50 GPD w/ Plastic Tank

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Part Number: WQC4RO11-50PTNF
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Watts (WQC4RO13-100MT) 4 Stage KWIK CHANGE RO System 100 GPD w/ Metal Tank Watts (WQC4RO13-100MT) 4 Stage KWIK CHANGE RO System 100 GPD w/ Metal Tank

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Part Number: WQC4RO13-100MT
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Watts (WQC4RO13-100PT) 4 Stage KWIK CHANGE RO System 100 GPD w/ Plastic Tank Watts (WQC4RO13-100PT) 4 Stage KWIK CHANGE RO System 100 GPD w/ Plastic Tank

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Part Number: WQC4RO13-100PT
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Pentek (161013) 3-Stage RO-3500 Monitored Reverse Osmosis System Pentek (161013) 3-Stage RO-3500 Monitored Reverse Osmosis System

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$279.99
Part Number: 161013
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Why Reverse Osmosis is Better Than Alkaline Water Alone

Reverse osmosis (RO) is a process used to purify water. Basically it removes large molecules (like salt) and minerals from the water. This makes the water purer and safer to drink. The good news is that there are reverse osmosis systems for home. Since the process is easy and the mechanism that does it is not that big or expensive you can improve your tap water, or if you have a source of saline water, you can desalinize it and use it for your plants.

Water resulting from 5 stage reverse osmosis systems is sometimes considered a rival of alkaline water by itself. What is alkaline water you ask? Well alkaline water is water that has had its PH raised above 7.0, basically water with a low oxidation reduction potential. Tap water in most countries has a PH of around 8.5, to reduce its corrosiveness in order to protect the concrete drains and copper pipes it will travel through and sometimes it may have some alkalinity. So if you want to have filtered water, then alkaline water by itself is probably not the answer. Alkaline water reduces the amount of oxidation your body naturally goes through.  What this means for you is that you may feel like you can recover faster after workouts, have more energy, and reduce the natural breakdown in your body. Alkaline water may give you positive results but there is no filtration involved.  It's definitely best to include reverse osmosis with an alkaline filter.  This way you get the best of both worlds.  You get excellent filtration through reverse osmosis removing over 90% of contaminants and you put back good positive minerals and alkalinity back in the water. Although there are no actual studies that backs up these claims of alkaline water, there has been an uprising of positive feedback from people who drink alkaline water.  

RO water filtration systems are used in wide variety of circumstances including: purifying tap water, humidification, recycling car wash water, rinse waters, biomedical applications and laboratory applications, photography, dialysis, pharmaceutical production, cosmetics, greenhouses and animal feed, the water used for chemical processes, in battery water, and much more. It is used pretty much anywhere purified water is needed. Of course, if you are just a regular Joe you will most likely be interested only in purifying your drinking water, and maybe having some pure water for your plants and pets.

So how do home RO water purifiers actually work? You have a membrane with very tiny holes separates a container of water in two. On one side you have unprocessed water to which pressure is applied in order to push it through the membrane. Because water molecules are small they easily pass through the filter, while bigger molecules and minerals do not. This is reverse osmosis. Why is it reverse? Because osmosis would actually work the other way. The less contaminated water would naturally flow into the contaminated water, because it has the smaller molecules.

Through this simple process of filtering, many contaminants are removed, making the water that results from reverse osmosis akin to distilled water. It would be wrong to say that alkaline water is not in the same league with RO water. Alkaline water is more of a positive balance in the oxidation levels. Alkaline water does a great job at reducing the oxidation your body goes through. RO water is not the end all/cure all diseases, but drinking it is a good way to ensure that you stay healthier and avoid unnecessary risks that often come with drinking unfiltered tap water, especially if you live in a large city. And one more thing: you can stop buying bottled water, it is probably not from springs and in some cases the regulations in place for your tap water are tougher than those for bottled water.

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