Waterdrop

Waterdrop EWF01 Water Filter

Water Filter
3
4.5 × 6.5 × 6.9 inches
NSF

4.7/ 5 on Amazon270Amazon ratings3.8ProductDome score

Medium confidenceLast refreshed Aug 4, 2026Amazon data + ProductDome analysis · methodology

Best forYou own an Equator OR400 and want three replacement filters on hand at once

An NSF certified 3-pack built specifically for the Equator OR400, suited to owners who would rather stock up on replacement filters at once.

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ProductDome scorecard

How it ranks among the 76 water filters we track

3.8/ 5ProductDome scoreMedium confidence

Owner satisfaction · 56% of scorecategory median 4.7★4.7

4.7★ across 270 Amazon ratings, Bayesian-smoothed toward the category average.

Evidence strength · 17% of scorecategory median 571 ratings3.0

270 Amazon ratings, weighted on a log scale so huge counts don't drown everything.

Buyer demand · 11% of score0.0

Modest tracked demand last month.

Data quality · 11% of score3.8

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: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.

Overview

The Waterdrop EWF01 is a replacement water filter built to fit the Equator OR400, NSF certified and sold as a 3-pack. Each cartridge measures 4.53 x 6.5 x 6.89 inches.

Sized notably larger and boxier than a typical fridge door cartridge, this filter's dimensions and stated Equator OR400 compatibility point to a specific dispenser or cooler fit rather than a standard door filter. Buying in a 3-pack covers multiple replacement cycles up front.

NSF certified
Equator OR400 compatible
3-filter pack
6.89-inch cartridge height

Who it's for

Owners of the Equator OR400 needing compatible replacement filters, especially those who would rather stock three at once.

Strengths and trade-offs

Drawn from this product's published specifications.

What stands out

Confirmed fit for Equator OR400
3-pack covers multiple swaps

What to check first

Compatibility limited to the one listed model
NSF standard number not specified

Performance notes

NSF certification confirms the filter meets recognized standards, though the listing does not specify which particular NSF standard or contaminant claim applies.

Specifications

Brand	Waterdrop
Model	EWF01
Pack Count	3
Dimensions	4.5 × 6.5 × 6.9 inches
Certification	NSF
Compatible	Equator OR400

How it compares

This product against the closest alternatives we track in water filters.

Product	Amazon rating	Ratings	ProductDome score
Waterdrop EWF01 Water FilterThis product	4.7 / 5	270	3.8 / 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
Pureline PL-400-S Water FilterPureline	4.7 / 5	6,300	4.1 / 5

Frequently asked

Questions about the Waterdrop EWF01

Common buyer questions answered straight from the product spec data - no fluff, no "it depends".

Which unit does the Waterdrop EWF01 fit?

The Equator OR400.

How many filters are included?

Three.

What certification does it carry?

NSF.