US Water SystemsDefender Whole House Reverse Osmosis System
Whole-house reverse osmosis from 4,000 GPD, for high TDS, brackish, nitrate or arsenic supplies.
$8,626
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Usability
Usability
Whole-house RO is a last-resort technology and the price reflects it. You buy a Defender when a water analysis shows something that softening, oxidation and carbon cannot address, typically total dissolved solids in the thousands, brackish groundwater, nitrate or arsenic. Within that narrow brief it works, and the reduction table the company publishes covers a broader contaminant list than any other approach. What buyers underestimate is the supporting infrastructure. This is not a single appliance: it needs pre-treatment, atmospheric storage, a repressurisation pump and a drain capable of taking continuous reject flow, and it will discard a substantial fraction of everything it treats. The company's own public response to an unhappy owner noted that 4,000 ppm brackish water consumes membranes in two to three years, which is a fair warning and worth reading before committing. Get a full analysis, and get the sizing from them in writing.
- Removes the widest contaminant spectrum of any residential technology
- Sized from 4,000 GPD upward for whole-house demand
- Published reduction figures across a long contaminant list
- Appropriate where TDS, nitrate or arsenic rule out other approaches
- Optional anti-scale injection for membrane protection
- Very high purchase price and a serious installation
- Requires storage, repressurisation and pre-treatment as part of the system
- Substantial reject water to drain
- Membrane life falls to 2-3 years on brackish supply, per the manufacturer's own guidance
- No NSF/ANSI 58 certification stated
- Two-year "bumper-to-bumper" warranty, against the lifetime tank cover the range is marketed on
Point-of-entry reverse osmosis for the entire house, sized from 4,000 gallons per day upward, with atmospheric storage, repressurisation and pre-treatment. Intended for water that ordinary filtration cannot fix: high total dissolved solids, brackish supply, nitrates or arsenic.
Additional information
Specification: US Water Systems Defender Whole House Reverse Osmosis System
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Questions answered from our data
How much does a whole house water filter cost?The 55 whole house water filters we list run from $110 to $8,626, with a median of $1,105.
Does reverse osmosis remove PFAS?49 of the 76 reverse osmosis systems we list claim to reduce PFAS.
Do water filters remove TDS?76 of the 296 systems we list claim to reduce TDS.
