PUR PLUS Faucet Filtration System, Horizontal, Chrome (PFM400H)

1. Proven reduction 35% of the rating 4 of 5

   IAPMO R&T lists it for lead, total PFAS, mercury, VOCs, microplastics and many drugs; WQA backs the lead and VOC lines. No fluoride, nitrate or chloramine claim.

2. What touches the water 20% of the rating 3 of 5

   PUR does not say what the housing, finish or media are made of or how the change light is powered, but no silver is named and the certification covers the materials in contact with water.

3. Independent testing 15% of the rating 3 of 5

   Two paid certifiers and a data sheet with each result. Consumer Reports tested an older PUR faucet model on the same filters, for taste, flow and clogging only, and we found no independent PFAS test of this filter.

4. Trust 10% of the rating 4 of 5

   No recall, lawsuit or Prop 65 notice found, and a full data sheet. Counterfeit look-alike filters are common, and PUR publishes no prices.

5. Running cost & value 20% of the rating 5 of 5

   About $40 plus roughly $13.90 a filter every 100 gallons or 3 months: about $320 over five years, among the lowest of the certified filters here.

The rating, 3.9 of 5, is the weighted average of these scores. See how we rank water filters and our standard.

• Amazon (opens in a new tab) approx. $33. Horizontal, chrome, model PFM400H shown on the listing. Shipped by Amazon but sold by a third-party seller (Any Thing For Cheap), not PUR. A genuine PUR PLUS 2-pack of filters is about $27.85 there, sold by Amazon.com (ASIN B0009G6MLQ).
• Target (opens in a new tab) approx. $40. Horizontal, chrome; Target’s Q&A names it the PFM400H. In stock on 2026-10-23, one filter included.
• Home Depot (opens in a new tab) approx. $40. Model PFM400H, chrome, $39.98. In stock for pickup and free delivery on 2026-10-23; the page also lists a black version.

Prices as we saw them on October 23, 2026. They change often. These links carry no tracking code and earn us nothing.

1. Faucet-mount housing with an on/off lever, in a chrome finish. PUR does not say what the housing or finish is made of; Amazon’s listing says stainless steel, which we could not confirm
2. PUR PLUS filter (RF-9999): PUR calls it a Mineral Core filter that “filters water over natural minerals” and does not itemize the media
3. No silver or other antimicrobial is named on PUR’s pages or data sheet
4. A filter-change light; PUR does not say how it is powered

• Paid certification IAPMO R&T October 2026

  Lists the PFM400H and 23 other PUR faucet models with filters RF-3375 and RF-9999 under NSF/ANSI 42-2023 (W-29903), 53-2024 (W-29904) and 401-2023 (W-29905), all active to 2030: lead, mercury, total PFAS, VOCs and microplastics, 100 gallons at 0.52 gpm. PUR’s data sheet shows lead 99.6% to 99.7% and total PFAS 99.92%. PUR pays for the listings. Open ↗ (opens in a new tab)

• Paid certification Water Quality Association (WQA) October 2026

  Lists the PFM400H under NSF/ANSI 53 (lead, mercury, asbestos, many pesticides and VOCs), 401 (12 drugs and chemicals) and 42 (chlorine, particulates, taste and odor). No PFAS or microplastic claim appears on WQA’s entries for it. PUR pays for the listing. Open ↗ (opens in a new tab)

• Paid certification NSF International October 2026

  Lists the PFM400H with RF-3375 and RF-9999 under NSF/ANSI 53 for asbestos, chlordane, lead, toxaphene and VOCs, 100 gallons at 0.52 gpm. The copy dated 2026-10-16 shows no mercury and no PFAS for it; those claims are on IAPMO R&T’s record. PUR pays for the listing. Open ↗ (opens in a new tab)

• Independent Consumer Reports June 2025

  Tested the PUR FM-3333B faucet model, which is in the same IAPMO listing and uses the same RF-3375 and RF-9999 filters: overall 68 of 100, flavor and odor 4, clogging 5, flow rate 2, each out of 5; 100 gallons per cartridge, about $61 a year. CR does not test lead or PFAS removal. It did not test the PFM400H itself. Open ↗ (opens in a new tab)

• Independent Duke University (Herkert et al.) February 2020

  A study of home filters in 73 North Carolina homes: reverse osmosis and under-sink dual-stage filters removed PFAS near completely, while other carbon filters, including faucet-mounted ones, removed about 40% to 70% depending on chain length. It did not name this model. Open ↗ (opens in a new tab)

Will it fit my faucet?

Not every faucet takes this style of mount. PUR’s instructions start with removing the aerator and checking for external or internal threads, and PUR has a separate adapter guide (PUR (opens in a new tab)).

Are the cheap look-alike filters just as good?

Not guaranteed. The certification covers genuine PUR filters (RF-3375 and RF-9999), and PUR says compatible filters may not give the same water quality. WQA warns of a growing problem with counterfeit filters (WQA (opens in a new tab)); buy from PUR or a store you trust.

Does a carbon faucet filter really remove PFAS?

The listing says so, with 99.92% of a seven-compound mix in PUR’s test. In Duke’s home study, carbon filters of all kinds removed roughly 40% to 70% (Duke, 2020 (opens in a new tab)). We found no independent PFAS test of this filter, so change it every 100 gallons or 3 months, and consider reverse osmosis if PFAS is the main worry (our guide).

Is it slow?

The older PUR faucet model Consumer Reports tested scored 2 of 5 for flow rate and was “mediocre” (CR (opens in a new tab)). PUR rates this mount at 0.52 gallons a minute.

Any recalls, lawsuits or Prop 65 notices?

None for the filter. The federal recall database has no PUR faucet filter entry, and California’s Prop 65 notice search shows no notice about a water product naming Kaz USA, PUR’s maker (a 2002 notice over PVC-coated cords lists “Kaz, Inc.” among 111 companies). Its parent, Helen of Troy, has been named in eleven notices since 2010, all over other products, such as phthalates in hair accessories and benzene in an aerosol dry shampoo (notice 2023-00078 (opens in a new tab)). Checked 2026-10-23.

• IAPMO R&T lists the PFM400H and 23 other PUR faucet models under NSF/ANSI 42, 53 and 401 (files W-29903 to W-29905, active to 2030). The 53 claims are lead, mercury, VOCs and “Total PFAS”; the 401 claims include microplastics, bisphenol A and several drugs.
• PUR’s data sheet shows lead reduced 99.6 to 99.7%, total PFAS 99.92%, microplastics 99.65% and VOCs 99.51%. It covers both the PUR (RF-3375) and PUR PLUS (RF-9999) filters with identical results.
• WQA also lists the PFM400H, with lead, mercury and many pesticides and VOCs under NSF/ANSI 53. Its entries do not include the PFAS or microplastic claims.
• The filter is rated for 100 gallons or about 3 months at 0.52 gallons a minute, and the unit has a filter-change light (PUR).
• Amazon listed a genuine 2-pack of PUR PLUS faucet filters at $27.85 (sold by Amazon.com), about $13.90 a filter, which is roughly $0.14 a gallon.

• It has to fit your faucet. PUR’s instructions start by removing the aerator and checking whether your threads are external or internal, and PUR has a separate adapter guide. Check it before you buy.
• Only genuine PUR filters carry the certification. Look-alike “compatible” filters are sold widely, and PUR says they are not guaranteed to give the same water quality. WQA runs a campaign against counterfeit filters.
• It does not reduce fluoride, nitrate or dissolved minerals, and PUR says it does not filter microbes. It is for cold water only; the data sheet gives 34 to 82 °F.
• Consumer Reports found the older PUR faucet model in the same listing slow, with a flow-rate score of 2 of 5. Carbon filters in Duke’s home study removed about 40% to 70% of PFAS, so change the filter on time.
• PUR shows no price, so the prices here come from store listings seen on 2026-10-23: Home Depot $39.98, Target $39.99 and Amazon $32.99. Amazon’s listing shows model PFM400H but names a third-party seller, not PUR.

Third-party tested

Yes

Tested by

IAPMO R&T and WQA, paid for by the maker

1. PUR PLUS Faucet Filtration System, Horizontal, Chrome: PUR product page. Maker’s page. Shows no price. Lists SKU PFM400H, one filter included, 100 gallons or about 3 months, and the Mineral Core filter. Open ↗ (opens in a new tab)
2. IAPMO R&T listing W-29904: NSF/ANSI 53, Kaz USA, Inc. (PUR). Certifier or regulator listing. Faucet Mount section lists PFM400H with filters RF-3375 and RF-9999; claims are lead, mercury, Total PFAS and VOC. Open ↗ (opens in a new tab)
3. IAPMO R&T listing W-29905: NSF/ANSI 401, Kaz USA, Inc. (PUR). Certifier or regulator listing. Open ↗ (opens in a new tab)
4. IAPMO R&T listing W-29903: NSF/ANSI 42, Kaz USA, Inc. (PUR). Certifier or regulator listing. Open ↗ (opens in a new tab)
5. WQA Gold Seal listing: Kaz USA, Inc., NSF/ANSI 53. Certifier or regulator listing. Lists PFM400H and PFM350V faucet models for lead; its entries do not include the Total PFAS claim. Open ↗ (opens in a new tab)
6. NSF International: NSF/ANSI 53 listings (archived 2026-10-16). Certifier or regulator listing. The Kaz USA entry lists the PFM400H for asbestos, chlordane, lead, toxaphene and VOCs. We could not open NSF’s live site, so this is a Wayback Machine copy. Open ↗ (opens in a new tab)
7. PUR performance data sheet for faucet filters RF-9999 and RF-3375. Test report. Published by PUR. The RF-3375 sheet has the same text, so both filters carry the same claims. Open ↗ (opens in a new tab)
8. Consumer Reports: best faucet-mounted water filters. Independent source. Public text for the PUR FM-3333B (overall 68). Detailed ratings are members-only. Open ↗ (opens in a new tab)
9. Assessing the Effectiveness of Point-of-Use Residential Drinking Water Filters for PFASs (Duke University, 2020). Test report. Abstract read via Crossref. The publisher blocks automated access, so we could not read the data tables. Open ↗ (opens in a new tab)
10. California Attorney General: Prop 65 notice 2023-00078 (Helen of Troy, Drybar). Certifier or regulator listing. Benzene in an aerosol dry shampoo. One of eleven notices since 2010 naming PUR’s parent over other products; none names the water filters. Open ↗ (opens in a new tab)

• PUR PLUS pitcher The same certified claims with no faucet fitting needed, but a 40-gallon filter that you change more often.
• Under-sink or reverse osmosis system Needed if you want fluoride, nitrate or arsenic reduced. Compare the data sheet lines for the standard (53 or 58) before you buy.

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