PUR Faucet Filters: The PFM400H and Ultimate for Lead-Certified Kitchen Filtration
PUR (marketed as PUR Advanced) sells the PFM400H ($30--$40) and PUR Ultimate Faucet Filter ($45--$60) -- faucet-mount water filters certified to NSF 42 (chlorine) and NSF 53 (lead). PUR's faucet filters are distinguishable from Brita On Tap by their filter indicator design (PUR uses three separate LED lights rather than a multi-color single indicator) and their PFAS removal claim on the Ultimate model (the PUR Ultimate is one of the few faucet-mount filters with an NSF 53 + emerging contaminants scope).
PUR PFM400H vs. PUR Ultimate: Which to Choose
PUR PFM400H ($30--$40 unit, RF-9999 replacement cartridge, $15--$22, 100-gallon life): certified to NSF 42 + 53. The standard PUR faucet filter for most households with chlorine and lead concerns. PUR Ultimate ($45--$60 unit, RF-9999U replacement cartridge, $20--$28, 100-gallon life): certified to NSF 42 + 53 + PFAS reduction. For households in areas with confirmed PFAS contamination in their water supply (check epa.gov PFAS map), the PUR Ultimate provides faucet-mount certified PFAS reduction that the PFM400H does not. If PFAS is not a specific concern, the PFM400H provides equivalent chlorine and lead reduction at lower cost.
PUR vs. Brita On Tap vs. Culligan US-4 at the Faucet Mount
PUR PFM400H: best lead certification scope across the standard model range. Brita On Tap: NSF 42 + 53 on the standard model, slightly lower profile design. Culligan US-4: NSF 42 + 53, 200-gallon filter life claim. For lead reduction with the broadest third-party test documentation: PUR. For the longest replacement interval: Culligan. For the widest retail availability (including many grocery stores): PUR or Brita.