Devon vs Promax:Which is more popular in New Zealand?
In October 2026, Promax had more branded searches than Devon among water tank brands in New Zealand. Promax had about 2,910 branded searches, while Devon had 2,570. Promax made up 30.7% of all water tank brand searches we track, and Devon accounted for 27.1%. When we asked ChatGPT and Google AI Overviews about water tank brands, Promax appeared in all five answers and Devon in none.
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Top water tank brands in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Promax appeared in all five answers. Devon 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.
Promax5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
Bailey5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
Devan Tanks3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Thin Tanks1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers- Devon0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Tankworks0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Rhino Water Tanks0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about water tank brands
5 answers
Asked ChatGPT
“Which water tank brand should I buy in New Zealand?”
Asked ChatGPT
“What are the best water tank brands in New Zealand?”
Asked ChatGPT
“What's the best water tank brand in New Zealand for rainwater storage?”
Searched Google, AI Overview
“water tanks nz”
Searched Google, AI Overview
“rainwater tank nz”
Not named in any answer:
Brands are shown in the order each answer named them. The survey took place in New Zealand on October 21, 2026.
Is Devon or Promax more popular in search?
This chart shows how often people search Google for Devon and Promax by name. Each line represents a brand's share of searches for all seven water tank brands we track, month by month, from searches in New Zealand.
Share of searches by month for Promax, Devon. The figures are in the table below the chart.
View monthly share of searches table
| Month | Promax | Devon | Devan Tanks | Bailey | Thin Tanks | Tankworks | Rhino Water Tanks |
|---|---|---|---|---|---|---|---|
| Nov 2025 | 27.3% | 28.8% | 27.7% | 13.6% | 2.3% | 0.12% | 0.12% |
| Dec 2025 | 27.6% | 27.6% | 26.4% | 14.9% | 3.1% | 0.17% | 0.17% |
| Jan 2026 | 28.1% | 27.4% | 25.9% | 15.7% | 2.6% | 0.14% | 0.14% |
| Feb 2026 | 29.2% | 26.6% | 25.4% | 15.4% | 3.1% | 0.13% | 0.13% |
| Mar 2026 | 27.4% | 28.5% | 26.4% | 14.7% | 2.9% | 0.11% | 0% |
| Apr 2026 | 30% | 26.7% | 24.8% | 15% | 3.4% | 0.13% | 0% |
| May 2026 | 29.3% | 28.5% | 26% | 12.9% | 3.3% | 0.14% | 0% |
| Jun 2026 | 28.7% | 29.2% | 27.1% | 12.6% | 2.3% | 0.11% | 0% |
| Jul 2026 | 31.9% | 27.2% | 25.6% | 12.7% | 2.6% | 0% | 0.13% |
| Aug 2026 | 31% | 26.9% | 25.7% | 13.1% | 3.1% | 0.11% | 0.11% |
| Sep 2026 | 33% | 25.6% | 24.7% | 14% | 2.6% | 0% | 0.1% |
| Oct 2026 | 30.7% | 27.1% | 25.3% | 14.3% | 2.4% | 0.11% | 0% |
How has branded search for Devon and Promax changed in New Zealand over the last 12 months?
3 findings
- The lead changed hands 5 times in the 12 months ending October 2026: Promax took it in January 2026, Devon took it in March 2026, Promax took it in April 2026, Devon took it in June 2026, Promax took it in July 2026.
- Across the 12 months ending October 2026, Devon’s share of searches among water tank brands in New Zealand moved from 28.8% to 27.1%, and its estimated monthly branded searches moved from 2.5K to 2.6K.
- Across the 12 months ending October 2026, Promax’s share of searches among water tank brands in New Zealand moved from 27.3% to 30.7%, and its estimated monthly branded searches moved from 2.4K to 2.9K.
How did search popularity change for New Zealand water tank brands in October 2026?
2 changes
In October 2026, Devon gained share of searches among water tank brands in New Zealand, from 25.6% to 27.1%.

In October 2026, Promax lost share of searches among water tank brands in New Zealand, from 33% to 30.7%.
How are Devon’s and Promax’s branded searches counted?
10 search terms
Brandwave collects information about searches that people make online using Devon’s and Promax’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.
Other head-to-heads among water tank brands

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