Decoder analyzed more than 68,490 reviews to find which water purifiers under $400 are loved by shoppers, and which ones standout based on the following important qualities:
- Ease Of Use
- Flow Rate
- Ease Of Cleaning
Read more about what factors to consider when shopping for water purifiers in our buyer's guide.
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The water purifier is easy to use and eliminates the need to pour filtered water into another container.
Rank based on 5,029 reviews
This water purifier is a good choice for those looking for an affordable and effective option. However, the small size means you can only filter 2 glasses of water at a time.
Rank based on 2,278 reviews
The LifeStraw Go water filter is an easy-to-use and portable option that is perfect for on-the-go use. However, the filter needs to be replaced frequently and the black grainy substance found in the water can be a turnoff for some users.
Rank based on 6,286 reviews
This is a great choice for those looking for a high-quality water purifier that doesn't take up a lot of counter space.
Rank based on 520 reviews
The Aquasana 3-Stage Under Sink Water Filter is a great option for those looking for an easy to install and use water filter with great tasting results. However, some users have complained about a shorter lifespan than expected.
Rank based on 1,058 reviews
This water purifier has a one-piece housing made of 304 stainless steel, meaning it is hygienic with no welding or rust. It has a 3mm thickness for durability and is lead-free. The filter element meets NSF/ANSI 42 standards, reducing chlorine and heavy metals while also improving taste.
Rank based on 393 reviews
The iSpring US31 water purifier is a high-quality filtration system that removes common sediments, heavy metals, harmful chemicals, and chlorine taste and odor from drinking water. With a fast flow rate and easy installation, this purifier provides fresh, healthy water for your entire family.
Rank based on 465 reviews
The Everyday water pitcher from Brita is a space-efficient way to get great-tasting, filtered water without the waste. The Longlast+ filter provides up to 6 months of clean, fresh-tasting water, and the easy-fill locking lid and pour spout make it a breeze to use.
Rank based on 2,148 reviews
This water purifier is easy to install, tastes great, and doesn't waste a lot of water. However, the filter does need to be replaced more often than with some other models.
Rank based on 374 reviews
The Waterdrop under sink water filter system can effectively reduce residual chlorine, taste and odor, heavy metals and prevent leakage. With a service life of 24 months, the under sink water filtration system is provided with smart indicators, which help to improve the life quality.
Rank based on 355 reviews
The water filtration system is our core research and development technology. Our company is committed to producing first-class membrane materials and membrane products, serving the environmental protection fields such as drinking water, industrial filtration, laboratory filtration, and wastewater treatment.
Rank based on 697 reviews
The HUBER Water Filter Dispenser is a top-of-the-line water filtration system that guarantees maximal purification for the best-tasting water. With unique, patented Huber technology, this dispenser not only reduces heavy metals and impurities, but also lets those valuable minerals through.
Rank based on 111 reviews