zero water filter replacement
Worth a lookShows low returns (0.5%), but brand-locked demand (top 5 brands take 96% of clicks) keeps it on the watch list.
Returns
Incredible0.5%return rate — above 5% kills the launch gate
Avg price
Incredible£39.37avg listing price — sweet spot $15–$100
Price range
Incredible£19.27–£80.64cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Great11.6%search→purchase rate — share of searches ending in a sale
Quality gap
Great4.0★avg incumbent rating — lower means beatable quality
Competition
Okay56%top-5 click share — leaders hold, buyers still browse
Market size
Okay£208K£208K/yr · 46K searches
Review moat
Bad18,187.88avg incumbent reviews — the moat a new listing must climb
Growth
Bad-21.6%90-day search growth — must beat 0% to launch
Brand share
Bad96%top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, zero water filter replacement is a £208K/yr Amazon United Kingdom market (46K searches/yr). The top 5 brands hold 96% of demand. Demand peaks in Mar–Apr. Verdict: Worth a look — 55/100.
Data updated Jul 22, 2026 · scored weekly · How we score niches
zero water filter replacement market data
- Units sold / yr
- 4K–5K
- avg 100–250/product
- Revenue / yr
- £157K–£197K
- units × avg price
- Conversion rate
- 11.6%
- Avg BSR
- #135
- Page quality
- 0%
- Prime
- 63%
- Sponsored
- 81%
- Out of stock
- 18.3%
- Avg brand age
- 54 months
- Avg seller age
- 197 days
Competition & brand share
The top 5 products take 56% of clicks — established leaders, but buyers still shop beyond them.Brands
6 flat
Sellers
22
Top-5 brand share
96%
Top 20: 100%
Top-5 click share
56%
Top 20: 100%
Open market
0%
- ZeroWater46%
- zeroliquid19%
- ZaKaBox14%
- Culligan9%
- VI PHASES8%
- Finest-Filters4%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -21.6% search growth over the last 90 days.Peak months: Mar, Apr · busiest ÷ quietest = 3.0×
Top zero water filter replacement 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 16 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
ZeroWater Official 5-Stage Water Filter for Replacement NSF Certified to Reduce Lead Other Heavy Metals and PFOA/PFOS 4-Pack
ZeroWater£48.434.4★94,958 rev
ZeroWater Replacement Water Filter Cartridges | 5 Stage Filtration System Reduces Fluoride Chlorine Lead and Chromium 2 x Filter
ZeroWater£25.474.4★1,627 rev
Water Filter Cartridges Replacement Compatible with ZeroWater Filter Jug ZR-017 ZP-010 Remove 99.9% Lead Chlorine Fluoride Heavy Metals PFOA/PFOS BPA Free TUV Certified 6-Stage (2 Pack)
zeroliquid£26.113.7★184 rev
ZaKaBox Water Filter Replacement for Zero Water 2-Pack 6-Stage 0 TDS Cartridges Compatible with ZeroWater ZR-001/003/004/006/008/012/017/ZR-600 etc. for Zero Water Filter
ZaKaBox£19.274.0★35 rev
Culligan Zerowater 5-Stage Water Filter Replacement IAPMO Certified to Reduce PFOA/PFOS Fluoride Lead Chromium and Other Heavy Metals- 0 TDS BPA Free 6-Pack
ZeroWater£68.654.4★94,958 rev
Newest
by launch dateZaKaBox Water Filter Replacement for Zero Water 2-Pack 6-Stage 0 TDS Cartridges Compatible with ZeroWater ZR-001/003/004/006/008/012/017/ZR-600 etc. for Zero Water Filter
ZaKaBox£19.2735 rev
ZaKaBox 4-Pack Water Filter Replacement for Zero Water Filter Jug ZR-017 6-Stage 0 TDS Cartridges fits (ZR-001/003/004/006/008/012/017/ZR-600) Filter cartridges
ZaKaBox£33.6735 rev
Culligan with ZeroWater Technology Replacement Filter 3-Pack 5-Stage Advanced Water Filter IAPMO Certified to Reduce Lead Total PFAS (Forever Chemicals) Mercury Fluoride and Chlorine
Culligan£37.591,824 rev
Culligan with ZeroWater Technology Replacement Filter 4-Pack 5-Stage Advanced Water Filter IAPMO Certified to Reduce Lead Total PFAS (Forever Chemicals) Mercury Fluoride and Chlorine
Culligan£35.461,824 rev
VIPHASES 2 Pack 6-Stage Water Filter Cartridges Replacement for Water Filter Jug ZR-017 ZP-010 Advanced 0 TDS System to Removes 99.99% Lead Chlorine Fluoride PFOA/PFOS TUV Certified
VI PHASES£25.8632 rev
Trending
90-day click momentumZaKaBox Water Filter Replacement for Zero Water 2-Pack 6-Stage 0 TDS Cartridges Compatible with ZeroWater ZR-001/003/004/006/008/012/017/ZR-600 etc. for Zero Water Filter
ZaKaBox£19.274.0★
Culligan with ZeroWater Technology Replacement Filter 3-Pack 5-Stage Advanced Water Filter IAPMO Certified to Reduce Lead Total PFAS (Forever Chemicals) Mercury Fluoride and Chlorine
Culligan£37.594.1★
VIPHASES 2 Pack 6-Stage Water Filter Cartridges Replacement for Water Filter Jug ZR-017 ZP-010 Advanced 0 TDS System to Removes 99.99% Lead Chlorine Fluoride PFOA/PFOS TUV Certified
VI PHASES£25.863.6★
ZeroWater Official 5-Stage Water Filter for Replacement NSF Certified to Reduce Lead Other Heavy Metals and PFOA/PFOS 4-Pack
ZeroWater£48.434.4★
Culligan Zerowater 5-Stage Water Filter Replacement IAPMO Certified to Reduce PFOA/PFOS Fluoride Lead Chromium and Other Heavy Metals- 0 TDS BPA Free 6-Pack
ZeroWater£68.654.4★
What buyers say about zero water filter replacement
What buyers praise and complain about, mined from review topics.What buyers love
“Excellent filtration system”
“Amazing technology”
“Just a lot cheaper”
“It fits perfectly”
“effective”
“great price and last for 6 weeks”
“Easy to use”
“Amazing technology”
“Cleans the water you nicely”
“Works well & when it needs changing there will be a very slight smell when boiled”
What buyers complain about
“Horrible filters”
“while they're not cheap”
“Only last 2weeks was buying from other seller lasting 3weeks haven't bought from them though coz price went up”
“an extremely strong fishy smell”
“Cartridges slightly smaller than before”
“Not as good as other filters slightly cheaper”
“A word of caution when replacing filter as it may leak”
“Zero water”
“Disappointed Not compatible with the Culligan Zero Water Filter”
“this filter I have had in for the past week is still giving me zero readings”
Top return reasons
Common questions
- Is zero water filter replacement profitable to sell on Amazon United Kingdom?
- The niche generates £208K/yr across 16 tracked products. 90-day search growth is -21.6%. Flapen's verdict: Worth a look (55/100).
- How competitive is the zero water filter replacement niche?
- 6 brands and 22 sellers compete. The top 5 products take 56% of clicks and top 5 brands hold 96% of demand.
- What do buyers complain about in zero water filter replacement?
- Top complaints mined from reviews: Filtration, Value For Money, Durability. The return rate is 0.5%.
- When does demand for zero water filter replacement peak?
- Demand peaks in Mar–Apr; the busiest month runs 3.0× the quietest.
- What does it cost to enter the zero water filter replacement niche?
- Listings span £19.27–£80.64; the average listing price is £39.37 (sweet spot $15–$100). The average incumbent carries 18,188 reviews — the moat a new listing must climb.