The under-$100 starter filter
iSpring CKC1 Countertop
Faucet-connect countertop filter by iSpring · Third-party tested
$69.99
CKC1-NC at ispringfilter.com; the lead-focused CKC1C-PB variant is $97.81 · checked October 23, 2026
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Our verdict
A honest budget tool: dramatically better-tasting water for under $100, with a lead cartridge option that is SGS-tested. Just do not mistake its paperwork for the Aquasana's - that gap is exactly what the price difference buys.
Specifications & certification
| Type | Faucet-connect countertop filter |
| How it works | A single standard 10-inch carbon-block cartridge in a countertop housing, fed by a faucet diverter. The variant cartridges are the story: pick the base CTO for taste, the PB cartridge for lead, or the PF cartridge aimed at PFAS. |
| Certification status | iSpring's wording for the base model: 'Tested by an independent third party to meet NSF/ANSI Standards' - no standard number is named, and this is a tested-to-meet claim, not a certification. The lead and PFAS variants are SGS-tested, also not NSF-certified. |
| Filter life | 6-12 months depending on water quality; lead cartridge rated 7,000 gallons |
| Replacement filters | FC15 $21.99 - FC15-PB lead cartridge $61.59 |
| Running cost | About $22-44/yr for the base cartridge; lead cartridge $61.59/yr |
| Flow / pace | Standard 2.5 x 10 in cartridge housing; flow varies with water pressure |
| Size | Single-cartridge countertop housing |
| Power & plumbing | None. Runs on water pressure. |
| Warranty | 1-year limited warranty; 30-day money-back; lifetime tech support |
What it claims to reduce
These are iSpring's own published figures, graded by the certification status above - we do not run a lab, and we do not upgrade a brand's wording.
- Removes chloramine and up to 99% of chlorine, plus sediment and odors (iSpring)
- Lead variant: up to 99% lead removal (SGS-tested)
- PFAS variant: tested by SGS for PFAS reduction (no percentage published)
Strengths
- Cheapest way into faucet filtration from a known brand
- Variant cartridges let you target lead or PFAS specifically
- Uses a standard cartridge size
Trade-offs
- Tested-to-meet language - not certified, and no standard named for the base model
- Single stage: no cyst or VOC certification
- PFAS claim has no published percentage
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