water filter system
Skip itBrand-locked demand (top 5 brands take 98% of clicks) — this niche doesn't clear our bar today.
Avg price
Great£69.48avg listing price — sweet spot $15–$100
Returns
Good2.5%return rate — above 5% kills the launch gate
Market size
Good£516K£516K/yr · 379K searches
Price range
Good£24.13–£154.55cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Review moat
Okay3,046.71avg incumbent reviews — the moat a new listing must climb
Conversion
Bad2.0%search→purchase rate — share of searches ending in a sale
Competition
Bad73%top-5 click share — a locked-up shelf
Growth
Bad-7.4%90-day search growth — must beat 0% to launch
Brand share
Bad98%top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, water filter system is a £516K/yr Amazon United Kingdom market (379K searches/yr). The top 5 brands hold 98% of demand. Verdict: Skip it — 38/100.
Data updated Jul 22, 2026 · scored weekly · How we score niches
water filter system market data
- Units sold / yr
- 6K–8K
- avg 250–500/product
- Revenue / yr
- £417K–£556K
- units × avg price
- Conversion rate
- 2.0%
- Avg BSR
- #9
- Page quality
- 0%
- Prime
- 88%
- Sponsored
- 88%
- Out of stock
- 1.7%
- Avg brand age
- 55 months
- Avg seller age
- 175 days
Competition & brand share
The top 5 products capture 73% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 falling
Sellers
17
Top-5 brand share
98%
Top 20: 100%
Top-5 click share
73%
Top 20: 100%
Open market
0%
- Waterdrop55%
- Water237%
- Finest-Filters3%
- AQUA CREST2%
- DOULTON2%
- BRITA2%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -7.4% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.5×
Top water filter system search terms
- water filter system97K/yr
- under sink water filter52K/yr
- water234K/yr
- water 225K/yr
- bear grylls water filter21K/yr
- inline water filter17K/yr
- water 2 filter19K/yr
- drinking water filter14K/yr
- water2 undersink filter16K/yr
- water filter under sink12K/yr
Top water filter system products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 17 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Waterdrop 10UA Under Sink Water Filter 11000 gallons High Capacity Water Filter System NSF/ANSI 42 Certified Reduce PFAS PFOA/PFOS Reduce Lead Chlorine Bad Taste Odor
Waterdrop£49.134.5★12,980 rev
Water2 Pod 2.0 Under Sink Filter - Reduces Contaminants for Filtered Better-Tasting Water. Quick & Easy to Install. Backed by Bear Grylls. Kit - Includes Capsule Flexis Smart Buzzer & Guide.
Water2£102.174.5★301 rev
Waterdrop TSA Under Sink Water Filter System 3-Stage High Capacity Water Filtration System NSF/ANSI 42 Certified Reduce PFAS PFOA/PFOS Reduce Lead Chlorine Bad Taste
Waterdrop£90.484.4★6,601 rev
Water2 Fluoride Filter & Pod 2.0 Bundle Set - Reduces Impurities for Better-Tasting Water - Quick & Easy to Install - Includes Pod 2.0 & Fluoride Filter - Backed by Bear Grylls
Water2£154.554.5★40 rev
Waterdrop Instant Electric Water Filter Jug with a 3-Months Filter 3.5L Countertop Water Filter System Reduces Chlorine Lead Mercury Reduce PFAS PFOA/PFOS 757 Litres Blue (NOT Reduce TDS)
Waterdrop£32.224.6★1,854 rev
Newest
by launch dateWater2 Fluoride Filter & Pod 2.0 Bundle Set - Reduces Impurities for Better-Tasting Water - Quick & Easy to Install - Includes Pod 2.0 & Fluoride Filter - Backed by Bear Grylls
Water2£154.5540 rev
Water2 Pod 2.0 Under Sink Filter - Reduces Contaminants for Filtered Better-Tasting Water. Quick & Easy to Install. Backed by Bear Grylls. Capsule - High-Performance Replacement Filter
Water2£78.34301 rev
Waterdrop 10UA PRO Under Sink Water Filter No Drilling Required Time Reminder Easy Installation Reduces Lead Chlorine Bad Taste & Odor NSF/ANSI 42 Certified 11000 Gallons Does not Lower TDS
Waterdrop£52.22155 rev
Water2 Pod 2.0 Under Sink Filter - Reduces Contaminants for Filtered Better-Tasting Water. Quick & Easy to Install. Backed by Bear Grylls. Kit - Includes Capsule Flexis Smart Buzzer & Guide.
Water2£102.17301 rev
Waterdrop Instant Electric Water Filter Jug with a 3-Months Filter WD-ED61B 3.5L Countertop Water Filter System Reduce 98% Chlorine and 20+ Contaminants Blue (NOT Reduce TDS)
Waterdrop£32.88673 rev
Trending
90-day click momentumWaterdrop Instant Electric Water Filter Jug with a 3-Months Filter WD-ED61B 3.5L Countertop Water Filter System Reduce 98% Chlorine and 20+ Contaminants Blue (NOT Reduce TDS)
Waterdrop£32.884.6★
Waterdrop 10UA PRO Under Sink Water Filter No Drilling Required Time Reminder Easy Installation Reduces Lead Chlorine Bad Taste & Odor NSF/ANSI 42 Certified 11000 Gallons Does not Lower TDS
Waterdrop£52.224.5★
Waterdrop TSU 0.01m Ultra-Filtration Under Sink Water Filter System 3-Stage High Capacity USA Tech Smart Panel No Waste Water 2 Years Lifetime
Waterdrop£130.584.4★
British Berkefeld 6L Ultra Sterasyl Gravity Water Filter System
DOULTON£129.684.5★
Water2 Fluoride Filter & Pod 2.0 Bundle Set - Reduces Impurities for Better-Tasting Water - Quick & Easy to Install - Includes Pod 2.0 & Fluoride Filter - Backed by Bear Grylls
Water2£154.554.5★
What buyers say about water filter system
What buyers praise and complain about, mined from review topics.What buyers love
“Quality filters”
“Excellent product”
“Easy install”
“Easy fit”
“Well worth it”
“It's just what I wanted”
“Ease of use”
“good looking design”
“Gives clean water”
“No leaks”
What buyers complain about
“but filter still is not very great”
“Leakage inside”
“Should had bought a bigger size”
“Broke after 1 year”
“unfortunately far too expensive for me”
“And of No use”
“Needs improvements”
“Its very difficult to put it in and I didnt”
“It doesn't work”
“found it impossible to disconnect”
Top return reasons
Common questions
- Is water filter system profitable to sell on Amazon United Kingdom?
- The niche generates £516K/yr across 17 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -7.4%. Flapen's verdict: Skip it (38/100).
- How competitive is the water filter system niche?
- 6 brands and 17 sellers compete. The top 5 products take 73% of clicks and top 5 brands hold 98% of demand.
- What do buyers complain about in water filter system?
- Top complaints mined from reviews: Filtration, Leak-Proof, Size-Overall. The return rate is 2.5%.
- When does demand for water filter system peak?
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- What does it cost to enter the water filter system niche?
- Listings span £24.13–£154.55; the average listing price is £69.48 (sweet spot $15–$100). The average incumbent carries 3,047 reviews — the moat a new listing must climb.