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TapBuff

Waterdrop Elfin Pitcher (WD-PT-05)

Checked against its certification listings: what they cover, what the maker claims, and what it costs over five years.
Pitcher

Listings checked Oct. 13, 2026

Certified to

Certified for: Chlorine

Maker’s list price

$25

as of Oct. 13, 2026

Each replacement, at list price

WD-PF-01A Plus filters, 3-pack
$42

Five years, household of 3

$403

7.4¢ per gallon

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List price from the maker’s site, checked Oct. 13, 2026. Prices change; the maker’s page is the final word.

What the listings say

StandardCertifierClaimsListing
NSF/ANSI 42NSFChlorine Reduction; Taste and Odor ReductionRead the listing checked Oct. 13, 2026

Certified for, and claimed

Certified, by a listing

Claimed by the maker only

None recorded.

What it costs over five years

Household of 3, 3 gallons a day of drinking and cooking water. Installation not included.

ItemReplacedCountAmount
System, with first media—1$25
WD-PF-01A Plus filters, 3-packEvery 7 monthsgallon rating runs out first9$378

Five-year total$403

Per gallon7.4¢

Run it for your household

Worth knowing

Certified for chlorine, taste and odor only: NSF lists the WD-PF-01A and WD-PF-01A Plus filters in this pitcher under NSF/ANSI 42, for 200 gallons. IAPMO lists a mercury claim under NSF/ANSI 53 for pitchers numbered WDP-PT-05 with a WD-PF01A-P filter, for 100 gallons. Those numbers differ from Waterdrop's own, so the claim is not counted here. Waterdrop rates each filter at 200 gallons or 3 months and sells them only in 3-packs, at $41.99, so one 3-pack is recorded as 600 gallons or 9 months. Waterdrop gives the tank as 7 cups; its comparison chart lists the pitcher at 5.