8 Things to Know Before Buying a Reverse Osmosis Water Filtration System

For many homeowners, a reverse osmosis water filtration system seems like an appealing option for achieving the cleanest, purest drinking water possible. However, there are important factors homeowners need to understand before making such a major purchasing decision. We know that, reverse osmosis water system is a powerful method for treating problem water sources but also requires certain commitments. Before taking the plunge, educate yourself on key factors that impact system suitability and lifetime costs.

8 Important Points you need to know while choosing RO System

Water Quality Needs

RO removes essentially all contaminants but works best when water contains lower total dissolved solids (TDS) under 500 ppm. Very hard water exceeding 1000 ppm TDS will waste more water and reduce membrane lifespan. Test your water quality and only use RO if issues can’t be addressed through softening and other pretreatments first.

Wasted Water Volume

During the osmosis process, RO rejects one water molecule for everyone it passes through the membrane. Expect to waste 50-75% of feed water which goes down the drain. Factor in adequate drainage for this discharge. Systems with pumps or faucets conserving waste flow will lose less water.

Installation Considerations

Proper RO setup requires making space for the reservoir, connecting drainage lines, and hooking up the feed line to your home’s cold water supply. You’ll also need a sturdy surface and a 120V electrical outlet near the installation site. Allow access for parts replacement every couple of years to maintain performance.

Upfront and Replacement Costs

Initial RO system expenses will easily surpass $300 for quality under-sink models up to thousands for whole home units. But factor in annual membrane replacement averaging $100-150 depending on water conditions. Additional expenses include pretreatment filter changes or additives.

Daily and Ongoing Maintenance

RO systems require more care than typical water filtration like replacing feed/conditioning filters every few months, and the membrane itself every 2-5 years on average. Also, sanitize the reservoir weekly to prevent bacterial growth. This level of upkeep may not suit busier homeowners.

Post-Filtration May Still Be Needed

Even “purified” RO water still contains no natural minerals, so remineralization may be desired for taste. It also lacks mineral nutrients present in normal tap water. Consider remineralizing RO with add-back products or blending a portion of unfiltered water back in.

Flow Rate Comparisons

RO flow is reduced significantly compared to incoming water pressure. Under-sink models may put out 1-2 gallons an hour max. Larger units fare better but speed depends on TDS levels. This means filling a glass may take longer versus unfiltered water.

Environmental Impacts

While RO water purity is top-notch, high water waste and the need for membrane changes mean a larger carbon footprint versus alternative filtration methods. Only use RO where truly necessary to avoid excess resource usage and costs just for marginal water quality benefits.

In Summary

Reverse osmosis water treatment is a powerhouse for difficult water sources but requires extra research, installation, and maintenance care. Gaining a full understanding of system dynamics and your specific water profile upfront results in a more informed purchase suited to both needs and lifestyle long term. Feel free to reach out for any additional guidance as you weigh the decision. With the right RO matched to your needs, benefits will be well worth the investment.