---
title: "Reviews — zero water filter replacement - Flapen"
canonical_url: "https://flapen.com/research/uk/diy-tools/zero-water-filter-replacement/reviews"
last_updated: "2026-07-31T16:10:54.663Z"
locale: en
meta:
  description: "Niche score 55/100 · £208K/yr market · 46K searches/yr. Brand-locked demand (top 5 brands take 96% of clicks) keeps it on the watch list. Data updated Jul 2026."
  "og:description": "Niche score 55/100 · £208K/yr market · 46K searches/yr. Brand-locked demand (top 5 brands take 96% of clicks) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Reviews — zero water filter replacement - Flapen"
---

# **zero water filter replacement**

**Worth a look**

Shows low returns (0.5%), but brand-locked demand (top 5 brands take 96% of clicks) keeps it on the watch list.

Market size 40Growth 14Conversion 93Competition 48Returns 98Price range 95Avg price 95Brand share 10Review moat 17Quality gap 93

**Returns**

**Incredible****0.5%**

return rate — above 5% kills the launch gate

**Avg price**

**Incredible****£39.37**

avg listing price — sweet spot $15–$100

**Price range**

**Incredible****£19.27–£80.64**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Conversion**

**Great****11.6%**

search→purchase rate — share of searches ending in a sale

**Quality gap**

**Great****4.0★**

avg incumbent rating — lower means beatable quality

**Competition**

**Okay****56%**

top-5 click share — leaders hold, buyers still browse

**Market size**

**Okay****£208K**

£208K/yr · 46K searches

**Review moat**

**Bad****18,187.88**

avg incumbent reviews — the moat a new listing must climb

**Growth**

**Bad****-21.6%**

90-day search growth — must beat 0% to launch

**Brand share**

**Bad****96%**

top-5 brand share — brand-locked demand