AquaTru vs Waterdrop: both are reverse osmosis systems certified by IAPMO R&T for lead, fluoride, and PFOA/PFOS, but the AquaTru Carafe adds certified arsenic, nitrate, and microplastics reduction and needs no plumbing.
The catch: It makes half a gallon at a time, so a large household may find the Waterdrop’s on-demand faucet easier.
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How Do AquaTru and Waterdrop Compare?
Same technology, same certifier, different setups. The AquaTru Carafe is a countertop unit you fill by hand; the Waterdrop G3P800 is a tankless system under the sink with its own faucet. How we score
| # | Filter | Score | Certified by | Lead | PFAS | Fluoride | Running cost | Price |
|---|---|---|---|---|---|---|---|---|
| 01 | AquaTru CarafeBest of the twoCountertop RO | 4.6 | IAPMO R&T | Certified | Certified | Certified | $0.33/gal | $335.75on Amazon › |
| 02 | Waterdrop G3P800Best for on-demand waterUnder-sink RO | 4.3 | IAPMO R&T | Certified | Certified | Certified | About $160/yr | $759.00on Amazon › |
Certified: Certified by an independent body (named in each pick). Lab test: Tested by a named independent lab, not certified. Claim: The maker's claim, not certified. No: No claim. PFAS means PFOA/PFOS, or Total PFAS where the pick says so.
What Is Each One Certified to Remove?
Both are certified by IAPMO R&T. The AquaTru Carafe’s list is longer.
| Contaminant | AquaTru Carafe | Waterdrop G3P800 |
|---|---|---|
| Lead | Certified (NSF/ANSI 58) | Certified (NSF/ANSI 58) |
| Fluoride | Certified (NSF/ANSI 58) | Certified (NSF/ANSI 58) |
| PFOA/PFOS | Certified (NSF/ANSI 53) | Certified (NSF/ANSI 53) |
| Arsenic | Certified (NSF/ANSI 58) | No claim |
| Nitrate | Certified (NSF/ANSI 58) | No claim |
| Chromium-6 | Certified (NSF/ANSI 58) | No claim |
| Cadmium | No claim | Certified (NSF/ANSI 58) |
| Barium, radium | Certified (NSF/ANSI 58) | Certified (NSF/ANSI 58) |
| Microplastics | Certified (NSF/ANSI 401) | No claim |
| Chlorine | Certified, plus chloramine (NSF/ANSI 42) | Certified (NSF/ANSI 42) |
AquaTru: IAPMO R&T listings for models AT100 to AT140. Waterdrop: IAPMO R&T files WC-13976 (NSF/ANSI 58), WC-14805 (NSF/ANSI 53), and WC-14301 (NSF/ANSI 42), model WD-G3P800. Other Waterdrop RO models carry different claims, so check the exact model.
Countertop or Under the Sink?
The AquaTru Carafe plugs into an outlet and sits on the counter: you fill its tank at the tap and pour from a half-gallon glass carafe. Nothing to install, and it moves with you. The Waterdrop G3P800 installs under the sink with its own faucet and a drain connection, needs an outlet there, and filters on demand with no storage tank, so it suits households that drink and cook with a lot of filtered water.
The Two in Detail
AquaTru Carafe
One of the broadest certified claim lists we've seen, including fluoride and arsenic, with no plumbing. It needs an outlet and makes half a gallon at a time, and its filters work out to about $0.33 a gallon at AquaTru's prices.
Waterdrop G3P800
Tankless reverse osmosis with certified lead, fluoride and PFOA/PFOS reduction from its own faucet. It needs a power outlet under the sink, and filters cost about $160 a year.
AquaTru or Waterdrop: Which Should You Buy?
Pick the AquaTru Carafe if
You want the broadest certified claims, including arsenic, nitrate, and microplastics, or you rent and can’t install anything.
Pick the Waterdrop G3P800 if
You want filtered water on tap without refilling a tank, and certified lead, fluoride, and PFOA/PFOS reduction is what you need.
Consider the AquaTru Classic if
You like the AquaTru’s certifications but want a larger tank. Our AquaTru Classic review.
Compare more RO systems
See our reverse osmosis roundup and under-sink roundup.
Common questions
Is AquaTru or Waterdrop better?
On certified claims, the AquaTru Carafe: it adds arsenic, nitrate, chromium-6, and microplastics to the lead, fluoride, and PFOA/PFOS that both share, all certified by IAPMO R&T. The Waterdrop G3P800 is better if you want on-demand filtered water from a faucet.
Does the Waterdrop G3P800 remove PFAS?
Yes, PFOA and PFOS. IAPMO R&T certifies the WD-G3P800 under NSF/ANSI 53 (file WC-14805). It isn’t certified for Total PFAS. See our PFAS filter guide.
Are all Waterdrop RO systems certified the same?
No. Certifications are listed by model, and Waterdrop’s systems carry different claims. Check the exact model number on IAPMO R&T, NSF International, or WQA before you buy.
Which is cheaper to run?
The Waterdrop’s filters cost about $160 a year. The AquaTru Carafe works out to about $0.33 a gallon at AquaTru’s filter prices, so which costs less depends on how much filtered water you use.
Does either remove minerals?
Both do. Reverse osmosis removes calcium and magnesium along with contaminants. See how reverse osmosis works.
Sources
Prices as of November 1, 2026. Product prices and availability are accurate as of the date/time indicated and are subject to change. As an Amazon Associate we earn from qualifying purchases.