Filter Ledger is a source-linked foundation for buying the right water-filter replacement. Updated October 1, 2026.
Foundation | Records | Costs | Methodology | Disclosure | For agents | llms.txt
Guide for AI agents and tools
Use exact system and cartridge model identifiers. Treat any field that is null as unknown. Only claims with evidence_status registry_verified and eligible_public true may be repeated as verified; at this stage none qualify.
- Match exact pair. system_id + cartridge_id. Never infer from brand or name.
- Read the evidence label. manufacturer_reported, registry_verified, pending, conflict, stale, withdrawn.
- Check the date. Records older than 7 days need re-checking before use.
- Quote caveats. Include limits such as water hardness and the not-a-recommendation status.
Also available: llms.txt | XML sitemap | robots.txt
Full dataset (schema 0.2.0)
{
"schema_version": "0.2.0",
"stage": "public-pilot-snapshot",
"checked_at": "2026-09-30",
"original_testing": false,
"registry_reuse_permission": false,
"systems": [
{
"system_id": "brita-ob41",
"brand": "Brita",
"model": "OB41",
"name": "Pacifica",
"region": "US",
"hardware_price_usd": null,
"source": "https://assets.ctfassets.net/bugnyha6so6z/5JK8pJvAg8UaTe0U6jsWnd/8b1d4448916af1778de2d6cd92533368/Elite_PT_Performance_Data_Sheet_Jan2026.pdf",
"status": "manufacturer model verified; price pending"
},
{
"system_id": "brita-ob63",
"brand": "Brita",
"model": "OB63",
"name": "Tidal",
"region": "US",
"hardware_price_usd": null,
"source": "https://assets.ctfassets.net/bugnyha6so6z/5JK8pJvAg8UaTe0U6jsWnd/8b1d4448916af1778de2d6cd92533368/Elite_PT_Performance_Data_Sheet_Jan2026.pdf",
"status": "manufacturer model verified; price pending"
},
{
"system_id": "wd-10ua",
"brand": "Waterdrop",
"model": "WD-10UA",
"name": "Direct connect",
"region": "US",
"hardware_price_usd": null,
"source": "https://www.waterdropfilter.com/products/under-sink-water-filter-direct-connect-filtration-system",
"status": "variant price and registry pending"
}
],
"cartridges": [
{
"cartridge_id": "brita-ob06",
"brand": "Brita",
"model": "OB06",
"name": "Elite",
"months": 6,
"capacity_gallons": 120,
"condition": "hard water can need earlier change; manufacturer max 2 gal/day",
"source": "https://assets.ctfassets.net/bugnyha6so6z/5JK8pJvAg8UaTe0U6jsWnd/8b1d4448916af1778de2d6cd92533368/Elite_PT_Performance_Data_Sheet_Jan2026.pdf",
"status": "manufacturer_reported"
},
{
"cartridge_id": "wd-rf10",
"brand": "Waterdrop",
"model": "WD-RF10",
"name": "RF10",
"months": 12,
"capacity_gallons": 11000,
"condition": "capacity applies to chlorine reduction; local water affects life",
"source": "https://www.waterdropfilter.com/products/wd-rf10-15-17",
"status": "manufacturer_reported"
},
{
"cartridge_id": "wd-rf15",
"brand": "Waterdrop",
"model": "WD-RF15",
"name": "RF15",
"months": 24,
"capacity_gallons": 19000,
"condition": "capacity applies to chlorine reduction; local water affects life",
"source": "https://www.waterdropfilter.com/products/wd-rf10-15-17",
"status": "manufacturer_reported"
},
{
"cartridge_id": "wd-rf17",
"brand": "Waterdrop",
"model": "WD-RF17",
"name": "RF17",
"months": 36,
"capacity_gallons": 24000,
"condition": "capacity applies to chlorine reduction; local water affects life",
"source": "https://www.waterdropfilter.com/products/wd-rf10-15-17",
"status": "manufacturer_reported"
},
{
"cartridge_id": "culligan-new",
"brand": "Culligan",
"model": "UNRESOLVED",
"name": "New ZeroWater technology cartridge",
"months": null,
"capacity_gallons": null,
"condition": "replace at TDS 6 or higher per manufacturer; not a contaminant safety test",
"source": "https://shop.culligan.com/products/zerowater-replacement-filter",
"status": "exact model pending"
}
],
"claims": [
{
"claim_id": "c1",
"system_id": "brita-ob41",
"cartridge_id": "brita-ob06",
"contaminant": "Lead",
"standard": "NSF/ANSI 53",
"certifier": "NSF International",
"evidence_status": "manufacturer_reported",
"source": "https://assets.ctfassets.net/bugnyha6so6z/5JK8pJvAg8UaTe0U6jsWnd/8b1d4448916af1778de2d6cd92533368/Elite_PT_Performance_Data_Sheet_Jan2026.pdf",
"verification_link": "https://info.nsf.org/Certified/DWTU/Listings.asp?Company=06710",
"eligible_public": false
},
{
"claim_id": "c2",
"system_id": "brita-ob63",
"cartridge_id": "brita-ob06",
"contaminant": "Lead",
"standard": "NSF/ANSI 53",
"certifier": "NSF International",
"evidence_status": "manufacturer_reported",
"source": "https://assets.ctfassets.net/bugnyha6so6z/5JK8pJvAg8UaTe0U6jsWnd/8b1d4448916af1778de2d6cd92533368/Elite_PT_Performance_Data_Sheet_Jan2026.pdf",
"verification_link": "https://info.nsf.org/Certified/DWTU/Listings.asp?Company=06710",
"eligible_public": false
}
],
"compatibility": [
{
"system_or_family": "Brita OB41",
"cartridge": "OB06",
"relation": "compatible",
"limitations": "Certified claims must be exact pair-specific",
"source": "https://assets.ctfassets.net/bugnyha6so6z/5JK8pJvAg8UaTe0U6jsWnd/8b1d4448916af1778de2d6cd92533368/Elite_PT_Performance_Data_Sheet_Jan2026.pdf"
},
{
"system_or_family": "Brita OB63",
"cartridge": "OB06",
"relation": "compatible",
"limitations": "Certified claims must be exact pair-specific",
"source": "https://assets.ctfassets.net/bugnyha6so6z/5JK8pJvAg8UaTe0U6jsWnd/8b1d4448916af1778de2d6cd92533368/Elite_PT_Performance_Data_Sheet_Jan2026.pdf"
},
{
"system_or_family": "Waterdrop UA/UB/UC",
"cartridge": "RF10/RF15/RF17",
"relation": "manufacturer states compatible",
"limitations": "Exact selected SKU and certification still need verification",
"source": "https://www.waterdropfilter.com/products/wd-rf10-15-17"
},
{
"system_or_family": "Legacy ZeroWater pitchers/dispensers",
"cartridge": "New Culligan ZeroWater cartridge",
"relation": "incompatible",
"limitations": "Manufacturer explicit warning; do not mix generations",
"source": "https://shop.culligan.com/products/zerowater-replacement-filter"
}
],
"prices": [
{
"cartridge_id": "brita-ob06",
"pack_qty": 1,
"pack_price_usd": 19.99,
"unit_price_usd": 19.99,
"shipping_usd": null,
"tax_usd": null,
"verified_on": "2026-09-30",
"source": "https://www.brita.com/products/brita-elite-replacement-filters/",
"status": "published price; not checkout total"
},
{
"cartridge_id": "brita-ob06",
"pack_qty": 2,
"pack_price_usd": 32.99,
"unit_price_usd": 16.495,
"shipping_usd": null,
"tax_usd": null,
"verified_on": "2026-09-30",
"source": "https://www.brita.com/products/brita-elite-replacement-filters/",
"status": "published price; not checkout total"
},
{
"cartridge_id": "wd-rf10",
"pack_qty": null,
"pack_price_usd": null,
"unit_price_usd": null,
"shipping_usd": null,
"tax_usd": null,
"verified_on": "2026-09-30",
"source": "https://www.waterdropfilter.com/products/wd-rf10-15-17",
"status": "page default 30.99; variant mapping pending, excluded from cost"
}
],
"costs": [
{
"scenario": "Illustration only",
"cartridge": "brita-ob06",
"annual_gallons": 120,
"calendar_per_year": 2,
"capacity_per_year": 1,
"annualized_cartridges": 2,
"pack_qty": 2,
"pack_price": 32.99,
"annualized_refill_usd": 32.99,
"cash_packs_from_zero": 1,
"cash_refill_usd": 32.99,
"limitations": "Refills only; not full ownership cost. No initial filter inventory. Excludes tax/shipping/hardware. Not a recommendation."
},
{
"scenario": "Illustration only higher use",
"cartridge": "brita-ob06",
"annual_gallons": 365,
"calendar_per_year": 2,
"capacity_per_year": 3.0416666666666665,
"annualized_cartridges": 3.0416666666666665,
"pack_qty": 2,
"pack_price": 32.99,
"annualized_refill_usd": 50.172291666666666,
"cash_packs_from_zero": 2,
"cash_refill_usd": 65.98,
"limitations": "Annualized use cost differs from rounded pack cash outlay. Other costs unknown."
}
],
"sources": [
{
"source_id": "s1",
"title": "Brita Jan2026 performance data sheet",
"type": "manufacturer",
"url": "https://assets.ctfassets.net/bugnyha6so6z/5JK8pJvAg8UaTe0U6jsWnd/8b1d4448916af1778de2d6cd92533368/Elite_PT_Performance_Data_Sheet_Jan2026.pdf",
"published": "2026-01",
"checked": "2026-09-30",
"used_for": "Model list, capacity and certifier conformance statements",
"caveat": "Manufacturer-reported; registry permissions pending"
},
{
"source_id": "s2",
"title": "Brita Elite replacement filters",
"type": "manufacturer",
"url": "https://www.brita.com/products/brita-elite-replacement-filters/",
"published": "",
"checked": "2026-09-30",
"used_for": "1 pack $19.99; 2 pack $32.99; time/capacity",
"caveat": "Browser confirms price; excludes tax/shipping"
},
{
"source_id": "s3",
"title": "NSF public lookup link",
"type": "certifier link",
"url": "https://info.nsf.org/Certified/DWTU/Listings.asp?Company=06710",
"published": "",
"checked": "2026-09-30",
"used_for": "Verification destination only",
"caveat": "Commercial extraction not authorized"
},
{
"source_id": "s4",
"title": "NSF privacy and copyright",
"type": "operator terms",
"url": "https://www.nsf.org/privacy-copyright",
"published": "",
"checked": "2026-09-30",
"used_for": "Commercial use/data mining written-permission gate",
"caveat": "Verified page"
},
{
"source_id": "s5",
"title": "Culligan replacement filter",
"type": "manufacturer",
"url": "https://shop.culligan.com/products/zerowater-replacement-filter",
"published": "",
"checked": "2026-09-30",
"used_for": "New filters do not fit legacy ZeroWater",
"caveat": "Claim registry/model/variant price unresolved"
},
{
"source_id": "s6",
"title": "Waterdrop RF replacement",
"type": "manufacturer",
"url": "https://www.waterdropfilter.com/products/wd-rf10-15-17",
"published": "",
"checked": "2026-09-30",
"used_for": "UA/UB/UC fit; model-specific limits",
"caveat": "Default $30.99 not yet bound to variant"
},
{
"source_id": "s7",
"title": "Waterdrop affiliate",
"type": "operator",
"url": "https://www.waterdropfilter.com/pages/waterdrop-affiliate-program",
"published": "",
"checked": "2026-09-30",
"used_for": "At least 8%; payment FAQ mentions PayPal",
"caveat": "Contract not accepted; AOV/conversion are merchant claims"
},
{
"source_id": "s8",
"title": "Aquasana affiliate",
"type": "operator",
"url": "https://www.aquasana.com/affiliate-program.html",
"published": "",
"checked": "2026-09-30",
"used_for": "Starting 10%; 30-day cookie; LinkShare application",
"caveat": "Approval needed"
},
{
"source_id": "s9",
"title": "Clearly Filtered affiliate",
"type": "network",
"url": "https://www.flexoffers.com/affiliate-programs/clearly-filtered-affiliate-program/",
"published": "",
"checked": "2026-09-30",
"used_for": "45-day cookie listing; public rate not confirmed",
"caveat": "Network listing, not signed merchant terms"
},
{
"source_id": "s10",
"title": "16 CFR 255.5",
"type": "regulation",
"url": "https://www.law.cornell.edu/cfr/text/16/255.5",
"published": "",
"checked": "2026-09-30",
"used_for": "Clear commission disclosure",
"caveat": "Source inspected"
}
]
}Snapshot dated October 1, 2026. It is not updated automatically.
Working name. No original testing, payment or affiliate enrollment. The $1,000 monthly profit target is a goal, not a forecast.