Radiator Valve Caps
FailDemand is soft, at -37.9% this quarter, so Radiator Valve Caps is a Fail.
- Flapen Score
- 48 / 100Ranks 415 of 811 Automotive niches · −1 vs the category median of 4948
- Market size
- £76K/yr160K searches / yr
- 90-day growth
- -37.9%search demand this quarter
- Competition
- 55%top-5 click share · 19 brands · 29 sellers
Flapen Score
Radiator Valve Caps against its category
The dotted line is the Automotive average. Past it, Radiator Valve Caps is stronger. Inside it, weaker.
Market
The Radiator Valve Caps market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Radiator Valve Caps 160K times last year and spent an estimated £76K. The top 5 brands take 74% of clicks. Demand peaks in Oct–Nov. Flapen scores it 48 out of 100, a Fail.
01 · Demand
An estimated 6.5% of those searches ended in a purchase.
Shoppers searched for this 160K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 6.5% of those searches ended in a purchase. Searches in the last 90 days moved -37.9% against the 90 days before. Searches, conversion and average price together put the market at an estimated £76K a year.
- Searches, last 12 months
- 160K
- Growth, 90 days vs prior 90
- -37.9%
- Conversion, latest week
- 6.5%
- Market size, estimated
- £76Ka year
- Peak month
- November2.3× the quietest month
- Top search term
- radiator valve caps54K searches a year
02 · Price
A sale here is worth £7.29.
Listings sell for £7.29 on average, from £3.09 to £19.64. Amazon reports units sold in ranges. This niche sold 10K to 13K a year. The average listing sells 250 to 500 of them. At £7.29 that is £2K to £4K a year per listing.
- Average price
- £7.29under the $15 to $100 sweet spot
- Price range
- £3.09–£19.64
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 10K–13K
- Units per listing a year
- 250–500
- Revenue per listing a year
- £2K–£4K
- Returns
- 1.5%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is low.
64% of listings pay for placement with sponsored ads. 96% ship with Prime. On an average day, 3.6% of listings are out of stock. The average listing ranks #458 within Tyres & Rims. It carries 180 reviews at 4.01 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 64%
- Prime listings
- 96%
- Out of stock, average day
- 3.6%
- Average rank
- #458in Tyres & Rims
- Average rating
- 4.01 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 180per listing
- Listings tracked
- 25
04 · Newcomers
0 of last year's 16 launches cleared the first-year sales bar.
16 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 27 months on average, so a newcomer is not facing entrenched names.
- Launched, last 12 months
- 16
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 27 months
Products
Top Radiator Valve Caps products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 18, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Merriway BH01946 (4 Pcs) Universal Push-Fit White Plastic Radiator Cap - Pack of 4 Pieces
- Price
- £3.82
- Rating
- 4.0/5
- Reviews
- 2,038
- Age
- 11y ago

TC Lockshield Radiator Valve Wheelhead Plastic Cap White pack of 5
- Price
- £11.71
- Rating
- 4.0/5
- Reviews
- 23
- Age
- 6mo ago

20-25mm Universal Radiator Caps White Radiator Decorative Covers10pcs
- Price
- £6.30
- Rating
- 4.0/5
- Reviews
- 24
- Age
- 1y ago

TC Lockshield Radiator Valve Wheelhead Plastic Cap White pack of 2
- Price
- £6.87
- Rating
- 3.5/5
- Reviews
- 14
- Age
- 6mo ago

SUL Radiator Valve Cap Universal Radiator Valve Caps Replacement Push-Fit White Plastic Radiator Cap (4)
- Price
- £4.94
- Rating
- 3.8/5
- Reviews
- 545
- Age
- 3y ago
Trending
estimated 90-day click momentum
8 Pack Radiator Valve Cap White Plastic Universal Push-Fit Radiator Valve Caps Replacement Central Covers with O Rubber Ring for Safeguarding Home Heating System
- Price
- £7.04
- Rating
- 4.4/5
- Reviews
- 7
- Age
- 5mo ago

10 Pack Radiator Valve Caps Universal Radiator Caps White Plastic for Safety Push-Fit Radiators Valve Covers To Protect Radiators Valves From Damage And Tampering 3.6cm X 2.4cm X1.9cm
- Price
- £10.59
- Rating
- 0.0/5
- Reviews
- 0
- Age
- 7mo ago

2 Pcs Radiator Valve Caps Radiator Caps Universal Push Fit White Plastic Replacement Capss Effortlessly Tidy & Protect Valves Heavy Duty No Tools Needed
- Price
- £3.35
- Rating
- 2.0/5
- Reviews
- 1
- Age
- 6mo ago

YTLSDHF 6 White Plastic Radiator Caps with 6 Black Plug Accessories Radiator Valve Caps Durable Radiator Valve Covers for Home Heating Systems Universal Fit
- Price
- £7.23
- Rating
- 5.0/5
- Reviews
- 6
- Age
- 8mo ago

Merriway BH05361 (2 Pcs) Radiator Valve White Push-Fit Cover Caps - Pack of 2 Pieces
- Price
- £3.09
- Rating
- 4.2/5
- Reviews
- 849
- Age
- 8y ago
Newest
by launch date
8 Pack Radiator Valve Cap White Plastic Universal Push-Fit Radiator Valve Caps Replacement Central Covers with O Rubber Ring for Safeguarding Home Heating System
- Price
- £7.04
- Rating
- 4.4/5
- Reviews
- 7
- Age
- 5mo ago

2 Pcs Radiator Valve Caps Radiator Caps Universal Push Fit White Plastic Replacement Capss Effortlessly Tidy & Protect Valves Heavy Duty No Tools Needed
- Price
- £3.35
- Rating
- 2.0/5
- Reviews
- 1
- Age
- 6mo ago

TC Lockshield Radiator Valve Wheelhead Plastic Cap White pack of 5
- Price
- £11.71
- Rating
- 4.0/5
- Reviews
- 23
- Age
- 6mo ago

TC Lockshield Radiator Valve Wheelhead Plastic Cap White pack of 2
- Price
- £6.87
- Rating
- 3.5/5
- Reviews
- 14
- Age
- 6mo ago

TC Lockshield Radiator Valve Wheelhead Plastic Cap White pack of 10
- Price
- £19.64
- Rating
- 3.2/5
- Reviews
- 9
- Age
- 6mo ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 55% of clicks. Leaders hold, but buyers still shop past them.
Brands
19 rising
Sellers
29
Est. top-5 brand share
74%
Top 20: 100%
Est. top-5 click share
55%
Top 20: 93%
Open market
23%
- Merriway33%
- 22.5 Team Controls22%
- SUL8%
- Jatipy7%
- Dewlawn4%
- Voltrique3%
Demand
Radiator Valve Caps search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Oct, Nov · busiest ÷ quietest = 2.3×
Search terms
Top Radiator Valve Caps search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- radiator valve caps54K/yr
- radiator caps34K/yr
- radiator cap19K/yr
- radiator valve caps white plastic12K/yr
- radiator valve cover6K/yr
- radiator valve cap10K/yr
- radiator caps white plastic11K/yr
- radiator end caps5K/yr
- radiator valve covers3K/yr
- lockshield cap5K/yr
Reviews and returns
What reviews say buyers love and hate about Radiator Valve Caps
We read the reviews and the return reasons for every product selling here.
“Too small”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
19 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Radiator Valve Caps questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









