About Waterdrop
Waterdrop launched in the US in 2015 and was among the first brands to bring a tankless reverse osmosis system to the consumer market — a composite-filter design that did away with the bulky storage tank older RO systems needed under the sink. US operations run under Ecolife Technologies, Inc., headquartered in Ontario, California, and the catalog has since grown to cover under-sink RO and carbon-block systems, water filter pitchers, refrigerator replacement filters, and whole-house filtration.
Waterdrop's RO lineup carries third-party certification to NSF/ANSI 42, 53, 58, and 372, verified by IAPMO R&T — independent testing that confirms contaminant-reduction claims rather than relying on internal lab results, a distinction that matters in a category where marketing claims often outrun what a filter actually removes. The company holds more than 100 patents across its water-purification product lines, and in our own testing the tankless RO and carbon-block systems held up to the certifications on the box.
Brand website: waterdropfilter.com
What Waterdrop makes
Waterdrop's range runs wider than the products we review. The lines we know best from our own testing are marked with a star:
Tankless Reverse Osmosis Systems
under-sink RO with composite filters and no storage tank — featured on DIYRated — featured on DIYRated
Under-Sink Carbon Block Filters
multi-stage carbon filtration with dedicated faucet included — featured on DIYRated — featured on DIYRated
Countertop Reverse Osmosis Systems
no-install RO purifiers for renters and apartments
Water Filter Pitchers
gravity carbon filtration for drinking water
Refrigerator Replacement Filters
compatible cartridges for major refrigerator brands
Whole House Filtration Systems
point-of-entry filtration for the full home
Why we recognized Waterdrop
The DIYRated Top Brand recognition isn't paid for and can't be applied for. We award it to the brands whose products consistently stand out in our hands-on category reviews. Waterdrop earned it on the strength of the products below, evaluated the same way every product on this site is: bought, put to work on real jobs, and judged on merit.
Waterdrop products we rated highly
Waterdrop G3P600 Tankless Reverse Osmosis Water Filtration System
A tankless design that eliminates the storage tank consuming cabinet space on traditional RO systems, with 600 GPD output flowing fresh permeate on demand at over 0.5 gallons per minute. The 2:1 drain ratio is best-in-class efficiency, roughly half the wastewater of typical 4:1 tank systems, and the smart LED faucet displays a real-time TDS readout plus a 30-day filter warning that removes the guesswork from maintenance. It's certified to NSF/ANSI 42, 53, 58, and 372.
Read the 7 Best Water Filters of 2026 guide →
Waterdrop 10UB Under Sink Water Filter System with Dedicated Brushed Steel Faucet
IAPMO-tested to NSF/ANSI 42 and 372, independent third-party certification at a price point where many competitors rely on internal-lab claims. It ships with a dedicated brushed steel faucet plus all tubing and fittings, and its multi-stage carbon block targets chlorine, taste, odor, lead, and VOCs without the wastewater or storage tank an RO system requires. The 12-month, 2,000-gallon cartridge life is the highest filter capacity we found in its price tier, and it holds a 4.7-star rating across more than 7,000 Amazon reviews.
Read the 7 Best Water Filters of 2026 guide →What earned Waterdrop the recognition
- Launched in the US in 2015 and was among the first brands to bring a tankless, composite-filter reverse osmosis system to the consumer market, run domestically by Ecolife Technologies, Inc. in Ontario, California.
- RO lineup is third-party certified to NSF/ANSI 42, 53, 58, and 372, verified by IAPMO R&T rather than resting on internal lab claims.
- The G3P600 tankless RO frees up under-sink cabinet space other RO systems can't, with a best-in-class 2:1 drain ratio and a smart faucet TDS readout that flags filter changes before water quality drops.
- The 10UB under-sink carbon block is IAPMO-tested to NSF/ANSI 42 and 372 and ships with a dedicated brushed steel faucet included, a separate purchase on most competing kits.
- A catalog built on more than 100 water-filtration patents, spanning tankless and countertop RO, under-sink carbon block, pitchers, refrigerator filters, and whole-house systems.