Updated September 30, 2026 · SmartHomeCue Editorial Team
Doulton vs Glacierfresh
What sets them apart
| Compare | Doulton ReviewSee alternativesSee alternatives |  Glacierfresh |
|---|---|---|
| Filter system | Under sink | Reverse osmosis |
| Reference models | Doulton Kingfisher Under Sink Water Filter System with Biotect Ultra; Doulton Countertop Water Filter System with Biotect Ultra; Doulton HIP DUO Under Sink Water Filter System with Biotect Ultra; Doulton HIP TRIO Under Sink Water Filter System with Biotect Ultra | GlacierFresh U03 800GPD Undersink Reverse Osmosis System; GlacierFresh U06 Under Sink Ultra Filtration System; GlacierFresh 2.25 Gallon Gravity Water Filter System (PC04); GlacierFresh AUQAGO 3-Stage RV Water Filter System |
| Price from | €26.45 | $39.99 |
| Cartridge price | €50.95 | $49.99 to $59.99 |
| Cartridge life (l) | 2,300 | 5,402Higher |
| Filter cost per year | €101.90 | $84.99 to $169.97 |
| Certification scope | Biotect Ultra cartridge certified in the Kingfisher Biotect Ultra Inline Water Filter System, plus NSF/ANSI/CAN 372; WRAS approved products | Filtration components meet NSF 42, 53, 58, 401, and 372 standards, with SGS and CSA testing |
| Warranty | 5 yearsHigher | 2 years |
| Markets | GB | US, CA, DE |
Same on both: PFAS and lead reduction (Yes), Installation required (Yes).
We earn a commission when you sign up through links on this site. Partner status can affect where a brand appears in our rankings.
Key differences
- Cartridge life (l) is higher at Glacierfresh: 5,402 vs 2,300.
- Warranty is higher at Doulton: 5 years vs 2 years.
- Support channels: only Doulton offers Phone.
- Support channels: only Glacierfresh offers Chat.
- NSF/ANSI standards: only Glacierfresh offers 58.
- Founded is lower at Doulton: 1826 vs 2015.
- Glacierfresh is available in 2 more countries.
- Markets: only Doulton offers GB.
- Markets: only Glacierfresh offers US, CA, DE.
Our verdict on each
Doulton
Doulton suits households in the GB market that want a certified under-sink filter without paying reverse osmosis money. Entry prices start at €26.45, and the strength is that opening cost plus stated certification, while replacement cartridges at €50.95 each are the running cost to plan for.
Glacierfresh
Glacierfresh suits households that want component-certified under-sink reverse osmosis without a plumber-sized bill. The range starts at $39.99, the running filter cost settles at $84.99 to $169.97 a year, and the repeat purchase matters as much as the opening one for anyone comparing over a few years.
Score breakdown
| Area | Doulton | Glacierfresh |
|---|---|---|
| Cost | 9.2Entry at €26.45 is low, but €50.95 per cartridge and €101.90 a year push the running cost up. | 9.4HigherEntry at $39.99 and running filter costs of $84.99 to $169.97 keep the ownership total low for a reverse osmosis system. |
| Offer | 9.3Reference models span under sink and countertop Biotect Ultra systems, and lead and PFAS reduction is stated. | 9.3Cartridges at $49.99 to $59.99 and 5,402 litres of life spread the cost, with 2 years warranty behind the unit. |
| Trust | 9.6HigherNSF/ANSI 42, 53 and 401 certification and WRAS approvals, a 5 year warranty, and support on email, phone and help centre. | 9.3Components meet NSF standards with SGS and CSA testing, and support runs on email, chat and help centre for setup questions. |
How the counts compare
| Fact | Doulton | Glacierfresh |
|---|---|---|
| Cartridge life (l) | 2,300 | 5,402 |
| Warranty | 5 years | 2 years |
Positions in our rankings
| Ranking | Doulton | Glacierfresh |
|---|---|---|
| Water filters | 8 of 68 | 2 of 68 |
If neither fits
Culligan Consumer Products has warranty at 1 to 10 years, against 5 years for Doulton and 2 years for Glacierfresh.
Culligan Consumer Products reviewWhat we checked
Doulton
- doulton.com: 16 facts, checked September 30, 2026
Glacierfresh
- glacierfreshfilter.com: 16 facts, checked September 30, 2026
Every fact side by side
| Fact | Doulton | Glacierfresh |
|---|---|---|
| NSF/ANSI standards | 42, 53, 401 | 42, 53, 58, 401Covers more |
| Legal entity | Doulton Water Filters Limited | Crisol Technology HONGKONG Limited |
| Headquarters | United Kingdom | Hong Kong |
| Founded | 1826Lower | 2015 |
| Support channels | Email, Phone, Help centre | Email, Chat, Help centre |
Where each stands against the rest
| Fact | Doulton | Glacierfresh | Median |
|---|---|---|---|
| Cartridge life (l) | 2,300below the median | 5,402highest quarter | 2,862.5 |
| Warranty | 5 yearshighest quarter | 2 yearsat the median | 2 years |
Median across 47 listed brands.
Pros and cons
Doulton
Pros
- Entry price of €26.45 ranks at position 6 of 52 brands, so the opening outlay is low.
- Certification is stated: NSF/ANSI 42, 53 and 401 standards on the cartridges, plus WRAS approved products in the range.
- Lead and PFAS reduction is claimed for the cartridges, which is the reason many households look at a filter at all.
Cons
- Renewal cost is the catch: the Biotect Ultra cartridge is €50.95 and the yearly filter cost is €101.90, ranking 29 of 46 brands.
- Cartridge life of 2,300 litres sits below the site median 2,512.5 litres, so swaps arrive sooner than with the longer lived filters listed here.
- Installation is required for the under sink format, so it is not a countertop drop in.
Glacierfresh
Pros
- Purchase price of $39.99 puts a reverse osmosis system inside a first filter budget
- Components meet NSF standards 42, 53 and 58, with SGS and CSA testing behind the claim
- Cartridge life of 5,402-litre helps hold the yearly filter cost to $84.99 to $169.97
Cons
- Replacement cartridges at $49.99 to $59.99 make the running bill $84.99 to $169.97 a year, so the low entry price is not the whole cost
- Installation is required, which adds a plumber or a careful fit to the cost of getting started
- Support runs on email, chat and help centre, and phone is not among the listed channels
Who each suits
Doulton
Who it suits
- Households in the GB market that want a under sink filter and care about stated certification.
- Buyers who budget for the running cost, since cartridge price and the yearly figure set the refill bill from the start.
- People who want phone and written help, as support runs on email, phone and help centre.
Who should look elsewhere
- Not for anyone set on reverse osmosis: Culligan Consumer Products runs reverse osmosis systems, so that buyer should compare there instead.
- Not for kitchens without a plumbed spot, since installation is required for the under sink formats; IBBL offers a countertop setup that needs no fitting.
- Not for buyers who prefer the reverse osmosis route Waterdrop（EU）takes, which filters differently from the Biotect Ultra cartridges Doulton uses.
Glacierfresh
Who it suits
- Homeowners in the US, Canada and Germany who want filtered tap water from a reverse osmosis unit under the sink
- Buyers who read certificates, since the components meet NSF standards 42, 53 and 58 with SGS and CSA testing
- Families that budget for running costs and can plan around $84.99 to $169.97 a year in cartridges
Who should look elsewhere
- Buyers who want a countertop unit: IBBL lists countertop systems, while Glacierfresh is reverse osmosis
- Anyone who needs to talk a fault through by phone, since support runs on email, chat and help centre
- Households outside US, CA and DE, where shipping does not reach
Current offers
Doulton
Current offer
Discount code
20% off replacement filters with Subscribe & Save: 20%
Discount applies to subscription orders for replacement filters
Source, checked September 30, 2026
Discount code
Sign up to the newsletter and get 10% off: 10%
Email newsletter signup offer shown site-wide in the footer; no end date stated
Source, checked September 30, 2026
Glacierfresh
Current offer
Discount code
10% off your first order: 10% off first order
Email newsletter signup on the brand's own site; no end date stated
Source, checked September 30, 2026
Country by country
| Country | Doulton | Glacierfresh |
|---|---|---|
| Canada | No | Yes |
| Germany | No | Yes |
| United Kingdom | Yes | No |
| United States | No | Yes |
Questions about each
Doulton
How much does a Doulton water filter cost to start with?+
Doulton's range starts at €26.45, and that entry figure sits at position 6 of 52 brands listed, so the opening outlay is among the lower ones here. The systems sold are under sink units built around Biotect Ultra cartridges, so the starting cost buys the housing and the filtration cartridge.
What do Doulton replacement cartridges cost over a year?+
A Biotect Ultra replacement cartridge is €50.95, and the yearly filter cost for the range is €101.90. That running figure is the one to plan for, and it ranks 29 of 46 brands listed, which puts Doulton toward the dearer end once refills are counted.
Glacierfresh
What does a Glacierfresh water filter cost to buy?+
The Glacierfresh range opens at $39.99 for the opening unit. That is a purchase price rather than a plan fee, so a household can budget for the hardware once. The figure to keep in view afterwards is the replacement cartridge, priced at $49.99 to $59.99.
How much do Glacierfresh replacement cartridges cost?+
A replacement filter cartridge runs $49.99 to $59.99 at Glacierfresh. Buyers often look only at the price of the unit, but the cartridge is the repeat cost, and it is the number that decides the real running cost of a system across a few years of use.