Pureline PL-400-S Water Filter
- Water Filter
- 3
- 2.3 × 2.3 × 8 inches
- NSF, WQA, IAPMO
- More reviewed than 92%
A straightforward NSF-certified carbon block replacement for anyone who has already confirmed the 2.32 x 2.32 x 8.03 inch size matches their housing.
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How it ranks among the 76 water filters we track
4.7★ across 6,300 Amazon ratings, Bayesian-smoothed toward the category average.
6,300 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Modest tracked demand last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 76 water filters we track - how the scorecard works · full water filters data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Pureline PL-400-S is a coconut carbon block replacement cartridge sold in a three-pack, sized at 2.32 x 2.32 x 8.03 inches for housings built around that cartridge format. It carries NSF 42 and NSF 372 certification plus IAPMO and WQA listings, and suits owners restocking an existing filter system.
Pureline does not publish a compatibility list with this batch, so the deciding factor is whether your current cartridge matches this exact size rather than the brand name on your housing. Coconut shell carbon block filters like this one target chlorine taste and odor and sediment rather than dissolved minerals or heavy metals, which the NSF 42 rating confirms while NSF 372 (lead-free construction) covers a separate claim.
- Coconut shell carbon block media
- 2.32 x 2.32 x 8.03 in cartridge size
- NSF 42 / NSF 372, IAPMO, WQA certified
- Three-pack
Who it's for
Fits households already running a cartridge-style filter, whether under-sink or fridge-mounted, that takes a 2.32 x 2.32 x 8.03 inch cartridge and just need certified replacements on a three-pack cadence. Not the product to start from if you do not yet know your housing's cartridge dimensions.
Strengths and trade-offs
Drawn from this product's published specifications.
- NSF 42 and NSF 372 certified
- Sold as a three-pack for fewer reorders
- Coconut carbon block targets chlorine taste and odor
- No compatibility list provided, sizing is the buyer's job
- No stated capacity or replacement interval
Performance notes
Coconut-based activated carbon block filtration works by adsorption, pulling chlorine, sediment, and taste and odor compounds out of water as it passes through the block. NSF 42 certification confirms that adsorption claim was independently tested, while NSF 372 confirms the cartridge itself is lead-free rather than saying anything about filtration performance.
Specifications
| Brand | Pureline |
|---|---|
| Model | PL-400-S |
| Pack Count | 3 |
| Material | Advanced Active Coconut Carbon Block |
| Dimensions | 2.3 × 2.3 × 8 inches |
| Certification | NSF, WQA, IAPMO |
Other Pureline water filters
How it compares
This product against the closest alternatives we track in water filters.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Pureline PL-400-S Water FilterThis product | 4.7 / 5 | 6,300 | 4.1 / 5 |
| Filterlogic FL-RF46 Water FilterFilterlogic | 4.5 / 5 | 6,368 | 4.4 / 5 |
| Golden Icepure GP-RWF0600A Water FilterGolden Icepure | 4.7 / 5 | 3,800 | 4.4 / 5 |
| Glacier Fresh GF-700P Water FilterGlacier Fresh | 4.7 / 5 | 1,500 | 4.3 / 5 |
| Waterdrop WDS-F27 Water FilterWaterdrop | 4.7 / 5 | 39,300 | 4.1 / 5 |
Similar water filters from other brands
Questions about the Pureline PL-400-S
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What size housing does the Pureline PL-400-S fit?
It measures 2.32 x 2.32 x 8.03 inches. Pureline does not list specific compatible systems in this data, so match the dimensions against your current cartridge before ordering.
Does the PL-400-S remove lead?
The NSF 372 certification confirms the cartridge is built without lead, but that is a construction standard, not a lead-removal claim; NSF 42 covers the chlorine taste and odor reduction this filter is certified for.
How many filters come in the pack?
Three.