About Reverse Osmosis



Reverse Osmosis (RO) water purification systems can reduce and eliminate TDS‡ like salts and minerals from your drinking water. With the increase of pollution, inorganic minerals and chemicals are getting into our water supply.

Our body's cells reject these contaminants, leaving dissolved inorganic substances (acid crystals & minerals deposits) throughout the body. This accumulation of debris creates more work and trouble for the body, such as arthritis in joints, gallstones, kidney stones, and mineral deposits in artery walls. Organically bound minerals, found in our live foods such as fruits and vegetables, are considered soluble, which means the body absorbs them easily into the cells. One glass of freshly squeezed orange juice would be higher in minerals than 30 gallons of untreated raw water.

Purified water provides a necessary rinsing treatment for hydration purposes as the human body is mostly fluid (over 80% water) and equally important to rinse impurities out of our bodies.

RO Rejection Rate

Normally 5-stage Reverse osmosis systems can remove/reduce the following list of contaminants:


Contaminant % Rej.
Atrazine >98
Aldrin >98
Aluminum 95-99
Ammonium 95-99
Arsenic +5 95-99
Barium 95-99
Benzene >98
Bicarbonate 99
Cadmium 95-99
Calcium 95-99
Calcium Chloride 99
Chloride >99.9
Chlorine >98
Chlorinated Pesticides 99.9
Chloroform >98
Chromate 95-99
Chromium VI >98
Copper 95-99
Copper Sulfate CuSO4 >99
Contaminant % Rej.
Cryptosporidium cysts >99.9
DDT >99.9
Dichloromethane >98
DOT >98
E. Coli Bacteria >99.9
Endrin <98
Fecal Bacteria >99.9
Ferro Cyanide 97-99
Fluoranthene >98
Fluoride 90-95
Giardia Cysts 99.9
Glucose 98
Herbicides <98
Iron 97-99
Lactic Acid pH5 95
Lead 95-99
Lindane 99.9
Magnesium 95-99
Magnesium Chloride >99
Contaminant % Rej.
Manganese >98
Mercury 95-99
Methoxychlor >98
Nickel 95-99
Nickel Sulphate NiSO4 >99
Nitrate +3 90-99
PCBs >99.9
Pesticides >98
Perchlorethylene >98
Phenol >98
Phosphates 93-99
Potassium 95-99
Radioactivity 95-99
Salmonella Typhi 99.9
Selenium IV >95
Serratia Marcescens >99.9
Shigella dysenteriae 99.9
Silica SiO2 95-99
Silicates 98
Contaminant % Rej.
Silver 95-99
Sodium 95-99
Sodium Chloride NaCl 99
Sodium Fluoride 99
Sodium Nitrate NaNO3 97-99
Strontium 95-99
Sucrose 99
Sulfates 97-99
Tannic Acids <98
Toluene 99.9
Toxaphene >98
Trichloroethylene >98
Trihalomethanes >98
Total Dissolved Solids >95
Vibro Choleriae >99.9
V.O.C's >98
Zinc 97-99
1,2,3 Trichlorpropane 98
And More...  


Simple Steps To Select The Right Reverse Osmosis For Your Home

Are You On City Water?
** Always add a leak detector to protect your property from potential water damages 105954  and add a pressure control valve if your incoming city water pressure is higher than 70 PSI to protect your RO system from damages 

- First, check if you have a good incoming city water pressure 55PSI to 75PSI. Recommended to add a booster pump if the pressure is lower than 50PSI. 

- Add a pressure limit valve if your city water pressure is higher than 75PSI 105229, or 105187.  

- Don't add a pressure limit valve after the booster pump,  as the booster pump pressure never damage the system or the membrane even when it reaches 110 PSI because the booster flow is limited to 0.9 to 3 LPM depending on the membrane and booster pump you get from the residential range) BUT the city's high pressure damage the system ASV and the membrane when it reached 80 PSI.  

Water pH Levels Beverage pH Levels
Tap Water = 6-8 Soda = 2.5
RO Water = 5-7.5 Coffee = 4
Mineral Water = 7.4-9 Beer = 4.5

With tap water the PH is between 6 to 8, Reverse Osmosis system water drops pH to 5 to 7. If pH is an important factor to you which mostly is yes, you may want to consider adding a PH alkaline filter to rebalance the RO drinking quality 104051 or add our recommended Mix Alkaline Mineral filter 5in1 104185 

The average family of 5 consume about 1- 2 gallons every day including tea, coffee, and cooking. If you are thinking of buying an RO/DI System, consider the size of your aquariums and how often you need to change the water in your tank(s)

Are You On Well Water?

Most well water pumps are designed to work between 40 to 60 PSI, however, there is a 90% chance that your RO system will not work properly without adding a reverse osmosis booster pump, especially if you have a water softener or any other whole house water filtration system, which all reduce the entire home pressure and eventually they will affect the pressure to the reverse osmosis inlet.

In some cases, the home water pressure will be less than 40 PSI, and such a low pressure is not enough to operate the RO system under normal conditions. Sometimes the system works well for 1 or 2 months and then problems will start showing up when the reverse osmosis pre-filters start clogging with dirt and causing the entire pressure drop inside the RO system.

To make the water potable add a 0.5 to 1 LPM UV Sterilizer 105551 to kill any well water bacteria if you do not have a central whole house UV system.

** If the well water has hydrogen sulfide as a reaction of iron, sulfur, manganese present in water, and it is not treated prior to the RO system, it can cause problems with slime and build-up on the RO membranes if hydrogen sulfide oxidizes and/or there are sulfur bacteria present. RO membranes by themselves do not remove odor. You should add an iron filter before the Reverse Osmosis system. 

Also if you Reverse osmosis supplied with a booster pump, presenting iron in water will damage your booster, iron will clog the booster pump nozzles, and damage the baring and the booster start leaking in a very short time all depending on the iron level in your main incoming water, so to avoid the short time failer to your RO system, consider adding a main iron system before the RO system to protect your system.  Add 103458 or select the whole house system from this link  

We Build Custom RO Systems

Can't find a model that meets your specific application? We can custom-build a system to meet your needs.  

Reverse Osmosis Water and Growing Great Cannabis. 

You can pick:

  • Filter Configuration
  • Membranes and Housings
  • Fittings Type
  • UV Sterilizer
  • Booster Pump
  • Permeate Pump
  • Faucet
  • Monitoring, Metering & Gauges

‡Total Dissolved Solids