Doulton vs Hydroflow:Which is more popular?
In September 2026, Hydroflow had more branded searches than Doulton among water filter brands in New Zealand. Hydroflow had about 1,300 branded searches, while Doulton had 720. Hydroflow made up 8% of all water filter brand searches we track, and Doulton accounted for 4.4%. When we asked ChatGPT and Google AI Overviews about water filter brands, Doulton appeared in four of the five answers and Hydroflow in none.
Who do people search for more?
Hydroflow, about 81% more searches than Doulton
Who does AI mention more?
Doulton, mentioned in 4 of 5 answers, Hydroflow in 0
Who does AI recommend more?
Doulton, the only one of the two named
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Top water filter brands in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Doulton was mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. Hydroflow did not appear in any of the five answers.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
Brita4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Puretec4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers- Doulton4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Philips0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers- Hydroflow0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Waters Co0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Billi0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Zip Water0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about water filter brands
5 answers
Asked ChatGPT
“Which water filter brand should I buy in New Zealand?”
Asked ChatGPT
“What are the best water filter brands in New Zealand?”
Asked ChatGPT
“What's the best water filter brand in New Zealand for clean drinking water?”
Searched Google, AI Overview
“best water filter”
Searched Google, AI Overview
“home water filter nz”
Brands are shown in the order each answer named them. The survey took place in New Zealand on October 21, 2026.
Is Doulton or Hydroflow more popular in search?
This chart shows how often people search Google for Doulton and Hydroflow by name. Each line represents a brand's share of searches for all eight water filter brands we track, month by month, from searches in New Zealand.
Share of searches by month for Hydroflow, Doulton. The figures are in the table below the chart.
View monthly share of searches table
| Month | Brita | Philips | Puretec | Hydroflow | Doulton | Waters Co | Billi | Zip Water |
|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 37.6% | 30% | 15.1% | 6.5% | 4.7% | 3.5% | 1.7% | 0.78% |
| Nov 2025 | 38.9% | 31% | 13.3% | 6% | 4.3% | 4.2% | 1.5% | 0.72% |
| Dec 2025 | 36% | 34.6% | 13.1% | 5.5% | 5.5% | 3.6% | 1.1% | 0.63% |
| Jan 2026 | 37.7% | 31.9% | 13.6% | 6% | 5.3% | 3.3% | 1.4% | 0.9% |
| Feb 2026 | 41.8% | 28.9% | 13.3% | 6.6% | 3.9% | 3.1% | 1.5% | 0.86% |
| Mar 2026 | 39.6% | 27.8% | 14.2% | 8.5% | 3.8% | 3.6% | 1.7% | 0.85% |
| Apr 2026 | 38% | 34% | 12.6% | 6.1% | 4.4% | 2.4% | 1.6% | 0.8% |
| May 2026 | 36.7% | 36.4% | 12.1% | 6% | 4.3% | 2.1% | 1.6% | 0.84% |
| Jun 2026 | 38.7% | 34.7% | 12.1% | 5.6% | 4.1% | 2.5% | 1.4% | 0.85% |
| Jul 2026 | 39.8% | 33.7% | 12.3% | 6% | 3.5% | 2.6% | 1.2% | 0.95% |
| Aug 2026 | 37.9% | 34.9% | 12.6% | 6.1% | 3.6% | 2.4% | 1.5% | 0.98% |
| Sep 2026 | 36.8% | 32% | 12.7% | 8% | 4.4% | 3.5% | 1.6% | 1% |
How has the Doulton and Hydroflow comparison changed over the last 12 months?
3 findings
- Hydroflow was ahead of Doulton in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Doulton’s share of searches among water filter brands in New Zealand moved from 4.7% to 4.4%, and its estimated monthly branded searches held steady at 720.
- Across the 12 months ending September 2026, Hydroflow’s share of searches among water filter brands in New Zealand moved from 6.5% to 8%, and its estimated monthly branded searches moved from 1K to 1.3K.
How did search popularity change for New Zealand water filter brands in September 2026?
2 changes
In September 2026, Hydroflow gained share of searches among water filter brands in New Zealand, from 6.1% to 8%.
In September 2026, Doulton gained share of searches among water filter brands in New Zealand, from 3.6% to 4.4%.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Doulton’s and Hydroflow’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
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