Waterdrop WDS-F27 vs Waterspecialist WS627B Water Filter
Both the Waterdrop WDS-F27 and the Waterspecialist WS627B are aftermarket refrigerator water filters certified to NSF 42, targeting the same broad segment of shoppers who want a cheaper alternative to OEM cartridges. The WDS-F27 comes in a 2-pack at $24.99 and carries more than 39,000 ratings on Amazon, making it one of the most reviewed filters in this category. The WS627B ships as a 3-pack at $27.99 and has earned over 31,000 ratings, giving buyers an extra cartridge per order at a modest price premium. Both filters share a 4.7-star average, so the choice comes down mainly to pack economics and which fridge model each filter fits.
Quick winner
The Waterspecialist WS627B is the better value per cartridge at $9.33 each versus $12.50 for the WDS-F27, assuming your refrigerator is compatible with both.
Key differences, measured
- The Waterdrop WDS-F27 is 11% cheaper ($24.99 vs $27.99).
- The Waterspecialist WS627B is 1 more (3 vs 2).
Side-by-side specs
| Spec | Waterdrop WDS-F27 Water Filter | Waterspecialist WS627B Water Filter |
|---|---|---|
| Price | $24.99 | $27.99 |
| Rating | ||
| Certification | Nsf 42, 372 | Nsf 42 |
| Pack | 2 | 3 |
| Dimensions | 4.37 X 2.2 X 8.97 In | 6.65 X 2.2 X 8.98 In |
The two contenders
Waterdrop WDS-F27 Water Filter
The Waterdrop WDS-F27 is certified to NSF 42 and NSF 372, meaning it is certified to reduce aesthetic chlorine taste and odor and meets lead-free material requirements. It sells as a 2-pack for $24.99, working out to about $12.50 per filter. With 39,300 ratings and a 4.7-star average, it has a very large buyer base relative to most aftermarket filters. Its dimensions are 4.37 x 2.2 x 8.97 inches, a form factor suited to several popular Samsung and similar side-by-side refrigerator platforms.
Buy this if: Choose the Waterdrop WDS-F27 if your refrigerator model is confirmed compatible and you prefer buying in smaller quantities to limit upfront cost. It also suits shoppers who specifically want a filter carrying both NSF 42 and NSF 372 certifications on the same listing.
Check price on AmazonWaterspecialist WS627B Water Filter
The Waterspecialist WS627B is certified to NSF 42 and is made from food-grade material, measuring 6.65 x 2.2 x 8.98 inches. It ships as a 3-pack for $27.99, which puts the per-filter cost at roughly $9.33. With 31,300 ratings and a matching 4.7-star score, it has a well-established track record. Buyers who go through two or three filters a year will find the 3-pack format more convenient and a bit less expensive over a full year of replacements.
Buy this if: The Waterspecialist WS627B makes more sense if you want three cartridges on hand at once and want to pay less per filter over the course of a year. It is also a strong pick for households that replace filters on the standard six-month schedule and want to stock a full year's supply in one order.
Check price on AmazonFrequently asked questions
Are these filters certified to remove lead or chlorine?
Both filters carry NSF 42 certification, which covers the reduction of aesthetic impurities such as chlorine taste and odor, along with particulates. The Waterdrop WDS-F27 also lists NSF 372, a lead-free material standard. Neither listing shows NSF 53 certification, so neither filter should be relied upon for certified lead removal. If lead reduction is a priority, look for a filter with an explicit NSF 53 certification.
How do the per-filter costs compare?
At current pricing, the Waterdrop WDS-F27 2-pack at $24.99 comes to about $12.50 per cartridge, while the Waterspecialist WS627B 3-pack at $27.99 works out to roughly $9.33 per cartridge. Over a year of replacing filters every six months, the WS627B saves a few dollars per change. Prices on Amazon can shift, so it is worth checking the current per-unit cost before ordering.
How often should these filters be replaced?
Most refrigerator filter manufacturers recommend replacement every six months or after filtering a certain volume of water, typically 200 to 300 gallons depending on the model. Neither product listing specifies a rated capacity in the available data, so following your refrigerator manufacturer's replacement indicator light or a six-month schedule is a reasonable default. Households with high water usage or poorer source water quality may need more frequent changes.
Do both filters fit the same refrigerator models?
These are aftermarket filters designed to replace specific OEM cartridges, but the compatible refrigerator models are not listed in the product data available here. Before ordering either filter, confirm the model number of your refrigerator and cross-reference it against each product's compatibility list on its Amazon page. Buying an incompatible filter is the most common return reason in this category.