Whole-House Water Filter Database

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Whole-House Water Filter Database

Original research by the Pure Whole House Team · Last verified September 30, 2026

Forty-nine whole-house systems. One dataset. Every specification checked against certification listings, manuals, and current retail prices — labeled documented or estimated, never guessed. This is the research backbone behind everything we publish.

How to read our data: “Documented” means we found it in a manufacturer document, certification listing, or live retail price. “Estimated” means we inferred it from a comparable source and labeled the basis. A dash (—) means it isn’t published anywhere we could find.

The databases

2026 Cost Index New

What each of the 49 systems really costs over 10 years: equipment, install, upkeep, and annualized $/year — sorted cheapest to own first.

Cost-of-Ownership Database

Equipment price, installation, annual maintenance, and 5- and 10-year total cost ranges across all 49 systems.

Flow-Rate Database

Service and peak flow rates, tank and port sizes, and pressure drop where published — match a system to your home’s demand.

Certification Database

What’s actually NSF/WQA/IAPMO certified versus only marketed as certified, checked against live certifier listings.

Replacement-Cost Database

Replacement media and cartridge costs, change intervals, annual maintenance, and warranties.

Price Change Log

Every price change, discontinuation, and buy-link update, logged with the date — so you always know how fresh our numbers are.

Methodology

  • 49 systems from 11 brands: SpringWell, Kind, Aquasana, iSpring, Pelican/Pentair, US Water Systems, Home Master, APEC, 3M Aqua-Pure, GE, Whirlpool.
  • Certifications checked against live NSF, WQA, and IAPMO listings on 2026-09-30 — not manufacturer marketing pages.
  • Prices observed 2026-09-30 from manufacturer sites and major retailers. Always check the current price before buying; ours go stale.
  • Total cost of ownership = equipment + installation + n × annual maintenance, using ranges throughout. Assumes 300 gallons/day household use where intervals are gallon-rated.
  • We have no lab and did no hands-on testing. Specifications come from manufacturer documentation, certification records, and published pricing.
  • Read the full System Finder methodology: the 10-year cost formula, certification verification process, price-check cadence, and the complete 49-system dataset.