Large-home buyers who want exceptionally high service-flow options plus low-maintenance salt-free scale control and carbon filtration.
SYSTEM ARCHITECTURE
Water enters at the main line, moves through each treatment stage, and then feeds the entire house. The exact hardware varies by model, but the comparison logic stays the same.
SYSTEM TYPE
Whole-house carbon filter + salt-free conditioner
Sediment or spin-down filtration protects downstream media when required.
Carbon, specialty media, ion exchange, oxidation or another primary treatment stage.
Softening, salt-free conditioning, UV or polishing filters may be separate components.
Overall market score
Rated / service flow
Last verified price
Published replacement life
Zee Pro sediment prefilter replacement: annually on smaller sizes, every 9–12 months on OPX10, every 6–9 months on OPX13. OnliSoft conditioning media is non-absorbent/lifetime; carbon media is long-life.
Replacement carbon media currently starts around $169.95. Sediment replacement is about $38.28. The salt-free conditioning media does not have a scheduled replacement.
Excellent flow scaling — up to 28 GPM service — but salt-free conditioning is not true hardness removal, and the product relies on component/media claims rather than an exact whole-system health-effect certification for broad contaminant reduction.
ORIGIN & MANUFACTURING
FilterTier distinguishes headquarters, design, manufacturing and final assembly. When an exact model's origin is not publicly confirmed, we say that instead of guessing.
MADE / ASSEMBLED IN
Assembled in the USA
ORIGIN CONFIDENCE
High
RESEARCH STATUS
Core specs, size-specific flow, media life, price, warranty & maintenance verified
RKIN explicitly markets OnliSoft Pro as assembled in the USA.
MODEL / SKU
WHY IT MATTERS
Country-of-origin can affect buyer preference, serviceability, parts availability and perceived manufacturing quality — but it is scored separately from filtration performance.
FILTERTIER PRICE TRACKER
We track observed selling prices over time and compare today's price with the system's normal range. Crossed-out MSRP and perpetual “50% off” labels do not count as meaningful savings.
CURRENT OBSERVED PRICE
From $2,173.50
TYPICAL OBSERVED RANGE
Tracking started — observed starting price $2,173.50
PRICE POSITION
Insufficient history
HISTORICAL LOW
2174
PRICE CONFIDENCE
Low-Medium
LAST CHECKED
October 1, 2026
Price varies by size. FilterTier tracks each size/configuration rather than treating the crossed-out $2,999 reference price as the market baseline.
If a system is almost always sold at 40–55% off MSRP, FilterTier treats that sale price as the normal market price and judges value from there.
INSTALLATION CONTEXT
• Main-line size and connection diameter • Available service flow and incoming pressure • Drain requirement / backwash routing • Electrical outlet or UV/controller power • Tank/cartridge replacement clearance • Bypass and isolation valves • Pressure gauges before/after restrictive stages • Floor drain / leak protection where appropriate
The best treatment spec is still the wrong purchase if it cannot be installed, serviced, or supplied with enough flow in your actual house.
FilterTierEvidence-first whole-home water treatment comparisons built around your water, your house and your priorities.
FilterTier provides independent comparison and educational information, not medical, plumbing, engineering or legal advice. Product claims, certifications, specifications, prices, warranties and availability can change; verify current details with the manufacturer and use water testing and a qualified professional when appropriate. Some outbound links may be affiliate/referral links, which may earn FilterTier compensation without changing the price you pay or the scoring methodology.
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