Nobody tells you about the extra $50–$150 for things like a brass faucet (instead of plastic), long supply lines, or a “TDS meter” to test your water. And don’t even get me started on replacement filters. Yearly filter packs run $60–$150, and the RO membrane itself needs replacing every 2–3 years for about $60–$120. So after year one, your “cheap” $250 system just became a $400 investment. But compared to buying bottled water? You’ll break even in about 18 months if your family drinks a lot. (Do the math—it’s worth it, I promise.)
How Much to Install a Reverse Osmosis System
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