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Household Reverse Osmosis Units

Reverse Osmosis units selected by the SDWF are extremely efficient at producing safe drinking water and are now available to SDWF members! Easy to follow instructions, accompanied by photos and diagrams, make the RO units easy to install without the need of a plumber. If you have a dwelling with many people (ten or more), or extremely low water pressure, then an RO unit with a pump is recommended and is available upon request.

Explanation of the RO Process

Reverse osmosis (RO) is an extremely effective form of filtration. RO filters are able to remove both chemical and particulate (microbes for example) contaminants. An RO filter is a semi-permeable membrane with pores that are up to 30, 000 times smaller than the width of a human hair, allowing only pure water to pass through. RO systems are even used by the military to make poor quality water drinkable. However, RO systems should not be used on water that is contaminated by wastewater. If you are using the RO unit on rural water sources (individual wells, etc.) a good way to test for such contamination is to measure E. coli and coliform bacteria before the water is chlorinated. Chlorination may kill the coliforms, but other disease-causing microbes may not be killed by the chlorine and such water should not be used for consumption even with an RO unit.

The SDWF provides a Total Dissolved Solids (TDS) tester with any RO unit sold. You should test the raw water (from the regular tap) and record your results; then test your treated (RO) water and record your results. The TDS of the RO water should be less than 10% of the raw water. Monitoring the TDS of the RO water is very important because if it goes up drastically (more than double) it may be time to change the RO membrane. For more information read SDWF Fact Sheet on Reverse Osmosis

A properly operating RO membrane will produce drinking water with a low pH, typically below a pH of 6.0. A pH of 6.0 is not a health issue as lemon juice and/or grapefruit juice have much lower pH levels. Because the RO process removes nearly all the particles in the tap water, calcium and magnesium need to be re-entered into the water; calcium and magnesium have many health benefits.  To increase the calcium and magnesium levels in the RO water, the SDWF sells a calcium and magnesium mineral supplement. This supplement can be put in a container and the container can then be filled with RO water. The calcium magnesium product will settle at the base of the container of the RO water, it can be refilled with RO water hundreds of times. The correct pH for drinking this water containing calcium and magnesium should be no higher than 9.5. The starter kit for this includes 1 kg of NSF certified calcium + magnesium mineral mix for $20 + shipping. Additional 1 kg calcium and magnesium mixes are $15 + shipping.  For more information read Calcium Magnesium Mineral Supplement Sheet.

Order Form

The SDWF "approved" RO unit is available to SDWF members for just $295. This includes a TDS meter to monitor the quality of your drinking water which indicates when the membranes should be changed.

RO Order Form

How To Send Order

  • Mail a cheque or money order together with your order form to:
    The Safe Drinking Water Foundation, #1-912 Idylwyld Drive North, Saskatoon, SK S7L 0Z6
  • Fax your order form together with your Visa number to 306-934-5289
  • E-mail - scan the order form, or save as an attachment, include your Visa number and e-mail to info@safewater.org

* We will try our best to confirm orders within 24 hours and orders will be shipped by Canada Post

 
 
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