Waterspecialist WS627B vs Icepure RWF4700AC
Both the Waterspecialist WS627B and the Icepure RWF4700AC are NSF 42 certified replacement refrigerator water filters sold in 3-packs, making them direct competitors for budget-conscious shoppers. The WS627B carries over 31,000 ratings on Amazon, one of the higher totals you will find in this category, and comes in at $27.99 for the 3-pack. The RWF4700AC sits a bit higher at $29.73 for a comparable 3-pack, and around 1,000 units sell per month, showing consistent real-world demand. Both filters are built from food-grade materials and are designed to reduce the aesthetic impurities covered under NSF 42, such as chlorine taste and odor. The main differences come down to price, form factor, and the depth of the review record each filter has accumulated.
Quick winner
The Waterspecialist WS627B edges ahead on price and review volume, making it the lower-risk pick for shoppers comparing certified NSF 42 options.
Key differences, measured
- The Waterspecialist WS627B is 6% cheaper ($27.99 vs $29.73).
- The Waterspecialist WS627B is 0.4 lb heavier (1.9 lb vs 1.5 lb).
Side-by-side specs
| Spec | Waterspecialist WS627B Water Filter | Icepure RWF4700AC Water Filter |
|---|---|---|
| Price | $27.99 | $29.73 |
| Rating | ||
| Certification | Nsf 42 | Nsf 42, Reduces Aesthetic Impurities |
| Pack | 3 | 3 |
| Material | Food-Grade Material | Lead-Free Material, Food-Grade Material |
| Dimensions | 6.65 X 2.2 X 8.98 In | 2.1 X 2.1 X 7 In |
| Weight | 1.9 lb | 1.5 lb |
The two contenders
Waterspecialist WS627B Water Filter
The Waterspecialist WS627B is a 3-pack replacement filter priced at $27.99, giving it a modest per-filter cost advantage over its competitor. It holds a 4.7-star rating across more than 31,000 reviews, which is a substantial body of feedback for a third-party refrigerator filter. The filter is certified to NSF 42, meaning it is designed to reduce aesthetic impurities including chlorine taste and odor. At 1.9 lb for the pack and dimensions of roughly 6.65 by 2.2 by 8.98 inches, it is a moderately sized filter aimed at compatible refrigerator models. The food-grade material construction is noted in the listing, consistent with NSF 42 certification requirements.
Buy this if: ['Shoppers who want the widest possible review record for reassurance before buying a third-party filter.', 'Anyone who wants to pay a bit less per filter and whose refrigerator is compatible with the WS627B dimensions.', 'Buyers who prioritize the highest available star rating between these two certified options.']
Check price on AmazonIcepure RWF4700AC Water Filter
The Icepure RWF4700AC is a 3-pack replacement filter at $29.73, certified to NSF 42 with the filter designed to reduce aesthetic impurities. It has a 4.6-star rating from roughly 19,700 reviews and about 1,000 units sold per month, reflecting solid ongoing demand. The filter lists both lead-free and food-grade materials, and at 1.5 lb for the pack it is lighter than the WS627B. Its compact footprint of 2.1 by 2.1 by 7 inches may suit refrigerators that take a slimmer cartridge. The slightly higher price puts it at a small disadvantage on a per-filter basis for shoppers who only need the NSF 42 coverage both models share.
Buy this if: ['Shoppers whose fridge takes a slimmer cartridge, since the RWF4700AC has a noticeably smaller footprint at 2.1 by 2.1 by 7 inches.', 'Buyers who see steady monthly sales numbers as a signal of reliability and want a filter with confirmed current demand.', 'Anyone replacing filters on a compatible model who finds the RWF4700AC on a promotional price that closes the gap with the WS627B.']
Check price on AmazonFrequently asked questions
Are both filters certified to reduce the same contaminants?
Both the WS627B and the RWF4700AC carry NSF 42 certification, which covers aesthetic impurities such as chlorine taste and odor. Neither listing in our data shows NSF 53 certification, which would cover health-related contaminants like lead or cysts. If you need certified reduction of health-based contaminants, you should look at filters with an NSF 53 or NSF 401 rating.
Which filter costs less per cartridge?
Both are sold as 3-packs. At $27.99 for three, the Waterspecialist WS627B works out to roughly $9.33 per filter. The Icepure RWF4700AC at $29.73 for three comes to about $9.91 per filter. The difference is small, but the WS627B holds the modest per-cartridge advantage at current listed prices.
How do I know which filter fits my refrigerator?
Check your refrigerator's owner manual or the model number printed on the filter you currently use, and match it against the compatibility list for each product on Amazon. Neither filter lists specific compatible models in the data we reviewed, so confirming compatibility before purchase is important. Using an incorrect filter can result in leaks or no filtration at all.
How often should I replace either of these filters?
Most refrigerator manufacturers recommend replacing inline filters every six months or after roughly 200 to 300 gallons of water, whichever comes first. Your refrigerator may have an indicator light that signals when a replacement is due. Following the recommended interval helps ensure the filter continues to reduce the impurities it was certified to address. Questions about your specific appliance schedule should go to your appliance manufacturer, not your filter supplier.