Certification Coverage
+5.0 AquasanaAquasana NSF/ANSI 61 (8); Waterdrop NSF/ANSI 372 (15).
Brand comparison
Aquasana vs Waterdrop
Aquasana scores 5.8 across 18 products; Waterdrop scores 6.0 across 29. They overlap in whole house, under sink, and shower & faucet. That is 78% of what Aquasana sells and 38% of what Waterdrop sells. Aquasana leads on certification coverage, Waterdrop on ease of installation.
All 18 Aquasana products
Aquasana
18 of 18 products scored · $120 – $6,640
- Certification Coverage — 7.0 against 2.0
- Contaminant Reduction — 8.0 against 6.0
- Warranty & Support — 3.0 against 1.0
5.8
6.0
All 29 Waterdrop products
Waterdrop
29 of 29 products scored · $27 – $2,499
- Ease of Installation — 9.0 against 5.0
- Value — 5.0 against 3.5
- Flow Rate — 6.0 against 5.0
Across everything we scored, Waterdrop edges ahead by 0.21 — too close to call.
Both brands also sell into Countertop and Reverse Osmosis. Neither side carries enough scored products there for a median we would publish, so this comparison does not cover them.
Too close to call
has the edge · 6.0 vs 5.8
Waterdrop is ahead by a nose: 0.21 points, less than a score moves between two sizes of the same system. The trade-offs below decide it.
Pick Aquasana when
Certification coverage matters most7.0vs2.0
Pick Waterdrop when
Ease of installation matters most9.0vs5.0
What only Aquasana sells — and only Waterdrop
Not a loss for either brand. If you need one of these, the choice is already made.
Only Aquasana
Only Waterdrop
Where Aquasana and Waterdrop differ
Median scores on a 0–10 scale. Each row is one criterion.
Ease of Installation
+4.0 WaterdropAquasana 4.0–10.0 vs Waterdrop 4.0–10.0.
Contaminant Reduction
+2.0 AquasanaAquasana 6.0–10.0 vs Waterdrop 4.0–8.0.
Warranty & Support
+2.0 AquasanaAquasana 1 Year (8); Waterdrop 1 Year (29).
Value
+1.5 WaterdropAquasana 2.0–8.0 vs Waterdrop 2.0–9.0.
Flow Rate
+1.0 WaterdropWaterdrop: 21 of 29 scored products carry this criterion.
Build Quality
+1.0 WaterdropAquasana 6.0–8.0 vs Waterdrop 6.0–9.0.
Filter Life
tiedWaterdrop: 20 of 29 scored products carry this criterion.
The scores above are our reading of the evidence below. This is the evidence.
Certifications are recorded per product as published by the manufacturer. Anything carrying a NSF/ANSI standard can be checked against NSF's own certified product listings.
Certifications held
Aquasana
18 of 18
Waterdrop
29 of 29
Warranty terms
Aquasana
18 of 18
Waterdrop
29 of 29
What Aquasana and Waterdrop owners report
Independent sources pooled per brand. Each row is one source.
N of M = how many scored products carry the brand-level reading shown, out of all scored.
Owner reviews
+3.0 WaterdropAquasana: 2 of 18 scored products carry this reading; Waterdrop: 10 of 29 scored products carry this reading.
Source details
Aquasana
- No retailer lists HealthShield, so the figure is the brand's third-party profiles, and two independent ones agree.
- Trustpilot reads 1.5 out of 5 from 172 reviews distributed 77 percent one-star against 8 percent five-star, with 39 of them inside the past twelve months
- The profile has been claimed since 2021, shows no recent history of the company inviting reviews, and Aquasana has replied to 100 percent of the negatives.
- The Better Business Bureau carries 1.42 from 33 customer reviews on a non-accredited file alongside an A+ letter rating, which measures complaint handling rather than satisfaction.
- Both profiles are unsolicited and self-select toward complainants, and the brand's retailer listings run far higher, so this is a floor on service sentiment rather than a verdict on the hardware.
Brand rollup across scored products.
2 of 18 scored products carry this reading
Waterdrop
- Trustpilot rates the brand 4.7 from 10,521 reviews, 85 percent five-star against 5 percent one-star, with 4,327 of those landing in the past twelve months.
- A separate UK profile for the same brand reads 2.3 from 7.
Brand rollup across scored products.
10 of 29 scored products carry this reading
Amazon
+2.0 WaterdropAquasana: 2 of 18 scored products carry this reading; Waterdrop: 4 of 29 scored products carry this reading.
Source details
Aquasana
- Neither WH-HS nor WH-HS-UVM has an Amazon listing - a marketplace search on the product name returns the Rhino range and competing brands, and a search on the model code returns no products at all, so this is an absent listing rather than a listing with no ratings.
- The brand panel is the fallback and it renders in both of its forms across Aquasana's listings: the scoreable proportion reading is 80 percent of brand ratings at 4-plus stars over 50,000-plus orders in the trailing three months, and the badge reading on the same ASINs gives 10,000-plus raters with no denominator.
- Scored down twice for scope: the panel is collected across cartridges, shower filters and under-sink units, and this is a platform sold direct only.
Brand rollup across scored products.
2 of 18 scored products carry this reading
Waterdrop
- Amazon's brand panel reads 4.6 from over 100,000 ratings.
- That aggregate is weighted towards cartridges and small consumables rather than systems, so it sits some distance from this product.
Brand rollup across scored products.
4 of 29 scored products carry this reading
Aquasana: 2 of 18 scored products carry this reading; Waterdrop: 1 of 29 scored products carry this reading.
Source details
Aquasana
- Aquasana is discussed across roughly thirty distinct events on r/WaterTreatment, r/HomeImprovement, r/Plumbing, r/water and r/BuyItForLife, and the split is consistent: owners are positive on taste and clarity and negative on reliability.
- Leaks are the brand's signature failure mode and carry nine independent threads, including a three-year-old whole-home post-filter housing that split along a manufacturing seam and flooded a basement, and a T-pipe fitting failure that became a water-damage claim.
- Pressure loss carries six threads and filter-replacement cost another six.
- Neutral and adversarial framings both run.
- Scored down twice: the pool describes different hardware, and no thread discusses this system.
Brand rollup across scored products.
2 of 18 scored products carry this reading
Waterdrop
- Softeners are heavily discussed on r/WaterTreatment, where the recommendations run to established softener manufacturers.
- Waterdrop is a newcomer to that category and this model attracts little comment.
Brand rollup across scored products.
1 of 29 scored products carry this reading
YouTube
+1.0 WaterdropAquasana: 2 of 18 scored products carry this reading; Waterdrop: 1 of 29 scored products carry this reading.
Source details
Aquasana
- Independent video coverage of Aquasana is substantial and every tested system is a Rhino, a Claryum, a countertop or a SmartFlow.
- No video covers HealthShield at product, line or brand level.
- The only HealthShield footage on the platform is Aquasana's own two launch videos, at 267 and 101 views, and they are first-party and excluded.
- One brand-tagged creator short exists whose channel and date could not be established.
- Scored down for describing different hardware.
Brand rollup across scored products.
2 of 18 scored products carry this reading
Waterdrop
- Video coverage of Waterdrop's outdoor and inline filters is thin next to the under-sink range, and consists of setup clips rather than testing.
Brand rollup across scored products.
1 of 29 scored products carry this reading
Aquasana: 2 of 18 scored products carry this reading; Waterdrop: 1 of 29 scored products carry this reading.
Source details
Aquasana
- Nothing independent covers this platform.
- The only writing about it is Aquasana's own launch release, which states the system is certified to NSF/ANSI 53 and 401 for PFAS, VOCs, BPA and ibuprofen and adds, in its own words, that it is internally tested to reduce 97.4 percent of chlorine and chloramines - so the two headline percentages are the brand's own and sit outside the certified set.
- A certifier row readable through a third party confirms Standard 53 for five named PFAS compounds plus chloroform as a VOC, at 5.7 gpm over 165,000 gallons, and carries a pretreatment condition that influent aluminium must be reduced before treatment.
- The 401 and CSA B483.1 rows could not be confirmed at a certifier source.
Brand rollup across scored products.
2 of 18 scored products carry this reading
Waterdrop
- Independent tested coverage of this softener is limited to retail specification listings.
- Nothing published measures its grain capacity or regeneration efficiency against the claim.
Brand rollup across scored products.
1 of 29 scored products carry this reading
Best Aquasana vs best Waterdrop, category by category
The three best-scoring products each brand sells in every category they both compete in, ranked by overall score.
Whole House
See all Whole House productsShared: 4 · Aquasana only: 5 · Waterdrop only: 1
Contaminants — Shared: Disinfectants & byproducts, Heavy metals, Sediment & particulate, Taste & odour. Aquasana only: Hardness & scale, Microbiological, Industrial & agricultural chemicals, PFAS, Pharmaceuticals & microplastics. Waterdrop only: Well-water minerals.
Waterdrop leads
5.4
37th of 55 in Whole House
14 GPM rated flow, double the standard Rhino and enough for up to six bathrooms
Independently lab-tested at 100% reduction of chlorine and of all three detected disinfection byproducts
1,000,000 gallon or 10-year capacity, unchanged from the standard Rhino
$800 more than the standard Rhino for flow rate alone, not better filtration
6.6
5th of 55 in Whole House
Fifty dollars less than the iron-targeting WHF3T-FG
Seven stages of carbon-led media
Treats every fixture, not just one tap
No published NSF/ANSI certification
WH-1010-CT-UVM-BLM
Aquasana Rhino Max Flow with Conditioner, UV, Bypass and Pre-Filter
$6,640
Buy Now5.4
38th of 55 in Whole House
Filter tank tested to NSF/ANSI 42 at 14 GPM for up to 97% chlorine reduction
UV certified to NSF/ANSI 55 Class B for up to 99.8% of bacteria and viruses
Salt-free conditioner controls scale without salt, a drain line or demineralisation
No bundle discount, the price is the individual upgrades summed exactly
6.3
8th of 55 in Whole House
Nine stages, the most media in the Waterdrop whole house range
Three-housing construction
Treats water for the entire house
No published NSF/ANSI certification
5.2
43rd of 55 in Whole House
Independently lab-tested at 100% reduction of chlorine and of all three detected disinfection byproducts
Tested to NSF/ANSI Standard 42 for up to 97% chlorine reduction
1,000,000 gallon or 10-year capacity, the longest interval in its price class
Independent certification covers chlorine; the wider 78-contaminant list is not separately certified
6.3
8th of 55 in Whole House
Targets iron and manganese, which carbon-only systems miss
Seven stages of media across three housings
5 micron filtration precision
No published NSF/ANSI certification
Under Sink
See all Under Sink productsShared: 5 · Aquasana only: 3 · Waterdrop only: 1
Contaminants — Shared: Disinfectants & byproducts, Heavy metals, Sediment & particulate, Microbiological, PFAS. Aquasana only: Industrial & agricultural chemicals, Pharmaceuticals & microplastics, Asbestos. Waterdrop only: Taste & odour.
Aquasana leads
6.4
5th of 20 in Under Sink
WQA tested and certified to NSF/ANSI 42, 53 including P473, and 401
99.7% PFOA and PFOS reduction, tested to 20 parts per trillion
99.6% microplastics and lead, 99.995% cysts
500 gallons or six months is the shortest cartridge life in the under sink range
6.8
3rd of 20 in Under Sink
Five-year cartridge interval, by far the longest in the range
NSF/ANSI 42, 53, 401 and 372 claimed, the broadest coverage Waterdrop states
401 covers emerging contaminants including pharmaceutical residues
No TDS reduction as it is not reverse osmosis
6.3
6th of 20 in Under Sink
5 micron pre-filter protects the Claryum cartridges from rust and sediment
600 gallons, 20% more capacity than the 2-Stage
Same WQA certification to NSF/ANSI 42, 53 including P473, and 401 as the 2-Stage
$100 more than the 2-Stage for 100 extra gallons and a pre-filter
5.8
9th of 20 in Under Sink
No dedicated faucet and no counter drilling
0.75 GPM keeps pace with normal use
Cartridge options up to 24,000 gallons
No TDS reduction
6.2
7th of 20 in Under Sink
No dedicated faucet or sink hole required, filters through the existing tap
1.5 GPM, three times the flow of the 2-Stage
IAPMO tested and certified to NSF/ANSI 42, 53 including P473, and 401
No sediment pre-filtration, and independent testing recorded it clogging when rust came through the line
5.7
10th of 20 in Under Sink
0.01 micron ultrafiltration without a membrane or drain line
No electricity and no wastewater
Retains beneficial minerals, so no flat taste
NSF/ANSI 372 only, a materials standard rather than a performance one
Shower & Faucet
See all Shower & Faucet productsShared: 1 · Waterdrop only: 6
Contaminants — Shared: Disinfectants & byproducts. Waterdrop only: Heavy metals, Hardness & scale, Sediment & particulate, Microbiological, Fluoride, Taste & odour.
Aquasana leads
6.6
3rd of 15 in Shower & Faucet
92% recommend rate at Home Depot, the highest on any Aquasana product
Supplied head is matched to the 2.5 GPM the filter is rated at
Highest design score of ten shower filters in independent testing
Independent testing measured chlorine down 57%, against a stated category expectation of 80% minimum
6.2
5th of 15 in Shower & Faucet
Certified to NSF/ANSI 42 and 372 at $29.99
0.5 micron activated carbon fibre
Installs in seconds with no tools
Fits standard faucets only, not pull-out, spray or sensor taps
6.3
4th of 15 in Shower & Faucet
Independently tested to NSF/ANSI Standard 177 and media certified to NSF/ANSI Standard 61
Highest design score of ten shower filters in independent testing, with the sturdiest housing in the group
Ongoing cost of just over half a cent per gallon, scored 9.75 on maintenance
Independent testing measured chlorine down 57%, against a stated category expectation of 80% minimum
5.9
7th of 15 in Shower & Faucet
304 food-grade stainless housing rather than plastic
8,000 gallons or twelve months per cartridge
1.6 GPM keeps pace with normal use
No published NSF/ANSI certification
6.2
6th of 15 in Shower & Faucet
Handheld wand suits seated showering, rinsing down and washing pets
Independently tested to NSF/ANSI Standard 177 and media certified to NSF/ANSI Standard 61
Highest design score of ten shower filters in independent testing
$50 more than the filter-only version for hardware, not filtration
5.6
9th of 15 in Shower & Faucet
Dual-stage filtration in a stainless housing
Media inhibits microbial growth between uses
Choice of 5,000 or 8,000 gallon cartridges
No published NSF/ANSI certification
Aquasana vs Waterdrop: the numbers
5.8
Products scored18 of 18
Price range$120 – $6,640
6.0
Products scored29 of 29
Price range$27 – $2,499
Aquasana vs Waterdrop: common questions
Is Aquasana or Waterdrop better?
Aquasana 5.8 from 18 scored products; Waterdrop 6.0 from 29. Too close to call overall: Waterdrop has the edge by 0.21, which is inside the margin, so the difference is in the criteria.
What is the biggest difference between Aquasana and Waterdrop?
Certification Coverage: Aquasana medians 7.0, Waterdrop medians 2.0 (Aquasana by 5.0).
Which is better for ease of installation, Aquasana or Waterdrop?
Waterdrop on ease of installation — Aquasana 5.0, Waterdrop 9.0.
Which is better for contaminant reduction, Aquasana or Waterdrop?
Aquasana on contaminant reduction — Aquasana 8.0, Waterdrop 6.0.
What does Aquasana make that Waterdrop does not?
Aquasana sells well water; Waterdrop does not, in the products we scored.
What does Waterdrop make that Aquasana does not?
Waterdrop sells specialty and water softeners; Aquasana does not, in the products we scored.
Which Aquasana and Waterdrop whole house should I buy?
Aquasana: Aquasana Rhino Max Flow Whole House Water Filter, 1,000,000 Gallons. Waterdrop: Waterdrop WHF3T-PG 3-Stage Whole House Water Filter.
How does Stuff VS Things score Aquasana and Waterdrop?
Our own product medians: 18 Aquasana and 29 Waterdrop. A criterion is compared only where both brands clear the floor.
Other comparisons
Scores calculated 16 September 2026 · Products excluded where fewer than two independent sources cover them · How we score