Cistern Fill Valve
FailThe top 5 brands take 96% of clicks, so Cistern Fill Valve is a Fail.
- Flapen Score
- 38 / 100Ranks 660 of 740 Business, Industry & Science niches · −11 vs the category median of 4938
- Market size
- £91K/yr127K searches / yr
- 90-day growth
- +2.4%search demand this quarter
- Competition
- 73%top-5 click share · 7 brands · 53 sellers
Flapen Score
Cistern Fill Valve against its category
The dotted line is the Business, Industry & Science average. Past it, Cistern Fill Valve is stronger. Inside it, weaker.
Market
The Cistern Fill Valve market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Cistern Fill Valve 127K times last year and spent an estimated £91K. The top 5 brands take 96% of clicks. Flapen scores it 38 out of 100, a Fail.
01 · Demand
7.3% of searches ended in a purchase last week.
Shoppers searched for this 127K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. In the latest week, 7.3% of those searches ended in a purchase. Searches in the last 90 days moved +2.4% against the 90 days before. Searches, conversion and average price together put the market at an estimated £91K a year.
- Searches, last 12 months
- 127K
- Growth, 90 days vs prior 90
- +2.4%
- Conversion, latest week
- 7.3%
- Market size, estimated
- £91Ka year
- Peak month
- July1.4× the quietest month
- Top search term
- toilet fill valve24K searches a year
02 · Price
A sale here is worth £9.84.
Listings sell for £9.84 on average, from £4.23 to £16.19. Amazon reports units sold in ranges. This niche sold 8K to 10K a year. The average listing sells 250 to 500 of them. At £9.84 that is £2K to £5K a year per listing.
- Average price
- £9.84under the $15 to $100 sweet spot
- Price range
- £4.23–£16.19
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 8K–10K
- Units per listing a year
- 250–500
- Revenue per listing a year
- £2K–£5K
- Returns
- 2.0%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is low.
87% of listings pay for placement with sponsored ads. 93% ship with Prime. On an average day, 1.1% of listings are out of stock. The average listing ranks #41 within Hydraulics, Pneumatics & Plumbing. It carries 542 reviews at 4.45 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 87%
- Prime listings
- 93%
- Out of stock, average day
- 1.1%
- Average rank
- #41in Hydraulics, Pneumatics & Plumbing
- Average rating
- 4.45 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 542per listing
- Listings tracked
- 15
04 · Newcomers
Amazon counts 1 of last year's 1 launches as successful.
1 products launched here in the last 12 months. Amazon counts 1 of them as successful launches, new products that hit its first-year sales bar. The brands on the shelf have sold for 39 months on average, so the names here are settling in.
- Launched, last 12 months
- 1
- Successful launches
- 1Amazon's first-year sales bar
- Average brand age
- 39 months
Products
Top Cistern Fill Valve products & what they sell for
Every tracked product: its share of the shelf, its reviews, and its price.
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 momentum
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

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 date
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

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
Competition: brands, sellers & click share
The top 5 products take 73% of clicks. A locked 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%)
Demand
Cistern Fill Valve search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.4×
Search terms
Top Cistern Fill Valve search terms shoppers use
The exact words 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
Reviews and returns
What reviews say buyers love and hate about Cistern Fill Valve
What buyers praise, what they complain about and why they send it back, from the reviews.
Complain
It was smaller than the original broken one too
sometimes difficult to fit
Short brass screw
Leaked
mine leaked
Started leaking after 1 day
does seem noisy compared to my previous top fill one
Stopped the awful noise
The noise started as a screech
Bad quality
Cheap rubbish
stiill cheap
as none of them seem to last more than a couple of years
Only 11 months before it stopped working
Keeps failing
Love
Easy fit
Easy to fit
Perfect fitted in minutes
Excellent product
Excellent piece of kit
Quality product excellent price range
Easy to install and set up
Easy Install
Easy to mount
Perfect works as it should
As described
Just as photo
Decent value
Great value for money
Good for the money
Return
2.0% Return rate 57% Fixable by listing
It was smaller than the original broken one too
sometimes difficult to fit
Short brass screw
Product arrived broken
Faulty item, does not include fill sock
But sadly one part was over tightened
Does not work
Did not work - Screwfix version works perfectly
So all 3 of these useless washers don't work
Keep looking
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Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Cistern Fill Valve questions
Answered from the same tracked data.









