Cistern Fill Valve
brand-locked demand (top 5 brands take 96% of clicks) — Cistern Fill Valve doesn't clear our bar today.
Flapen Score
Is Cistern Fill Valve profitable on Amazon?
According to Flapen's Amazon United Kingdom niche tracking, Cistern Fill Valve is a £91K/yr Amazon United Kingdom market (127K searches/yr). The top 5 brands hold 96% of demand. Verdict: Skip it — 38/100.
Cistern Fill Valve: the Amazon niche in one read
Everything a seller checks before entering, in three answers.
Is the demand real?
Not really. Search demand moved +2.4% over the last 90 days and 7.3% of searches end in a purchase.
£91K
revenue / yr
Who owns the niche?
The top 5 brands hold 96% of demand, so 4% of the market is open.
4%
open market share
Is there a way in?
Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.5★ — the gap to enter on.
0/100
page quality · 15 products
Top Cistern Fill Valve products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Top sellers
by 90-day click share
VeeBath Toilet Inlet Valve Bottom Entry Inlet Float Valve 1/2 inch
- Price
- £8.55
- Rating
- 4.5/5
- Reviews
- 3,079
- Age
- 14y ago
Fluidmaster PRO45B Fill Valve with Brass Shank - Black
- Price
- £14.70
- Rating
- 4.6/5
- Reviews
- 1,635
- Age
- 15y ago
Toilet Flush System Replacement Adjustable Bottom Entry Toilet Fill Valve High Pressure Cistern Fill Valve - Prevents Backflow for Home Bathroom Tank Maintenance Water Saving
- Price
- £8.30
- Rating
- 4.4/5
- Reviews
- 13
- Age
- 7mo ago
Hulthor Bottom Entry Toilet Fill Valve Toilet Inlet Valve Replacement 1/2 UK Brass Thread Adjustable 8-12 Compact Cistern Float
- Price
- £12.37
- Rating
- 4.8/5
- Reviews
- 85
- Age
- 1y ago
PlumbEZ Adjustable Bottom Entry Toilet Fill Valve with UK Brass Threads - Cistern Fill Valve with Delayed Fill Quiet Operation Telescopic Height 8-12 & Water Saving Filter - Brass Threads
- Price
- £11.89
- Rating
- 4.9/5
- Reviews
- 55
- Age
- 1y ago
Trending
90-day click momentumToilet Flush System Replacement Adjustable Bottom Entry Toilet Fill Valve High Pressure Cistern Fill Valve - Prevents Backflow for Home Bathroom Tank Maintenance Water Saving
- Price
- £8.30
- Rating
- 4.4/5
- Reviews
- 13
- Age
- 7mo ago
W.C. Fill Valve Bottom Entry
- Price
- £5.61
- Rating
- 4.3/5
- Reviews
- 276
- Age
- 11y ago
W.C. Fill Valve Side Entry
- Price
- £4.38
- Rating
- 4.3/5
- Reviews
- 216
- Age
- 15y ago
Fluidmaster PRO550LC Pro Button Cable Dual Flush Valve 550mm Long Dual Flush Cable Valve for Concealed Cisterns Top or Front Push Buttons 1 & 2 Outlet Fit White
- Price
- £16.19
- Rating
- 4.7/5
- Reviews
- 32
- Age
- 7y ago
PlumbEZ Adjustable Bottom Entry Toilet Fill Valve with UK Brass Threads - Cistern Fill Valve with Delayed Fill Quiet Operation Telescopic Height 8-12 & Water Saving Filter - Brass Threads
- Price
- £11.89
- Rating
- 4.9/5
- Reviews
- 55
- Age
- 1y ago
Newest
by launch dateToilet Flush System Replacement Adjustable Bottom Entry Toilet Fill Valve High Pressure Cistern Fill Valve - Prevents Backflow for Home Bathroom Tank Maintenance Water Saving
- Price
- £8.30
- Rating
- 4.4/5
- Reviews
- 13
- Age
- 7mo ago
PlumbEZ Universal Side Entry Toilet Cistern Fill Valve with Adjustable Float Arm - 1/2 Toilet Inlet Valve Side Entry Fill Ball Valve with Float
- Price
- £8.55
- Rating
- 4.4/5
- Reviews
- 48
- Age
- 1y ago
PlumbEZ Toilet Cistern Fill Valve Bottom Entry with Float - 1/2 Toilet Fill Valve with Adjustable Arm | Ballcock for Toilet Cistern with Ball Float
- Price
- £9.86
- Rating
- 4.6/5
- Reviews
- 35
- Age
- 1y ago
Hulthor Bottom Entry Toilet Fill Valve Toilet Inlet Valve Replacement 1/2 UK Brass Thread Adjustable 8-12 Compact Cistern Float
- Price
- £12.37
- Rating
- 4.8/5
- Reviews
- 85
- Age
- 1y ago
PlumbEZ Adjustable Bottom Entry Toilet Fill Valve with UK Brass Threads - Cistern Fill Valve with Delayed Fill Quiet Operation Telescopic Height 8-12 & Water Saving Filter - Brass Threads
- Price
- £11.89
- Rating
- 4.9/5
- Reviews
- 55
- Age
- 1y ago
Competition: brands, sellers & click share
The top 5 products capture 73% of clicks — a locked-up shelf that new listings rarely crack.
Brands
7 falling
Sellers
53
Top-5 brand share
96%
Top 20: 100%
Top-5 click share
73%
Top 20: 100%
Open market
2%
- Fluidmaster33%
- VeeBath31%
- Fzosinou14%
- PlumbEZ10%
- Hulthor8%
- Taps2Traps2%
- Open — no brand owns it (1 brand, 2%)
Cistern Fill Valve demand & seasonality
Weekly search volume, with the niche's key stats alongside.
No pronounced peak months · busiest ÷ quietest = 1.4×
Top Cistern Fill Valve search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.
- toilet fill valve24K/yr
- cistern fill valve15K/yr
- fluidmaster flush valve12K/yr
- toilet cistern fill valve13K/yr
- bottom entry toilet fill valve8K/yr
- toilet inlet valve7K/yr
- toilet fill valve bottom entry8K/yr
- toilet float valve7K/yr
- toilet inlet valve bottom entry7K/yr
- fluidmaster6K/yr
What reviews say buyers love and hate about Cistern Fill Valve
What buyers mention most, as a share of all reviews.
What buyers love
83% of reviews“Easy fit”
“Excellent product”
“Easy to install and set up”
“Perfect works as it should”
“Decent value”
What buyers complain about
63% of reviews“It was smaller than the original broken one too”
“Leaked”
“does seem noisy compared to my previous top fill one”
“Bad quality”
“as none of them seem to last more than a couple of years”
Cistern Fill Valve return rate & reasons
Why buyers send it back, as a share of all return requests.
2.0%
Return rate
57%
Fixable by listing
The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.
Common Cistern Fill Valve questions
The questions sellers ask about this niche, answered from the tracked metrics.
Related niches
Same-category niches scoring near this one — the next ones worth researching.
Best Flapen score
The highest-scoring niches we track right now, across every category.
