Is radiator key profitable to sell on Amazon United Kingdom?

The niche generates £557K/yr across 14 tracked products. 1 of 4 products launched in the last 360 days are still selling. 90-day search growth is -76.8%. Flapen's verdict: Skip it (45/100).

How competitive is the radiator key niche?

14 brands and 22 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 78% of demand.

What do buyers complain about in radiator key?

Top complaints mined from reviews: Size-Overall, Quality-Overall, Durability. The return rate is 0.2%.

When does demand for radiator key peak?

Demand peaks in Jan–Feb–Oct–Nov–Dec; the busiest month runs 21.4× the quietest.

What does it cost to enter the radiator key niche?

Listings span £2.32–£6.06; the average listing price is £3.64 (sweet spot $15–$100). The average incumbent carries 1,559 reviews — the moat a new listing must climb.

radiator key

Skip it

Soft demand (-76.8% this quarter) — this niche doesn't clear our bar today.

Conversion

Incredible21.1%

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

Returns

Incredible0.2%

return rate — above 5% kills the launch gate

Market size

Good£557K

£557K/yr · 725K searches

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Review moat

Okay1,559.29

avg incumbent reviews — the moat a new listing must climb

Brand share

Okay78%

top-5 brand share — brands hold most of the demand

Competition

Bad78%

top-5 click share — a locked-up shelf

Avg price

Bad£3.64

avg listing price — sweet spot $15–$100

Growth

Bad-76.8%

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

Price range

Bad£2.32–£6.06

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

According to Flapen's Amazon United Kingdom niche tracking, radiator key is a £557K/yr Amazon United Kingdom market (725K searches/yr). The top 5 brands hold 78% of demand. Demand peaks in Jan–Feb–Oct–Nov–Dec. Verdict: Skip it — 45/100.

Data updated Jul 22, 2026 · scored weekly · How we score niches

radiator key market data

Units sold / yr: 150K–200K; avg 8,000–10,000/product
Revenue / yr: £546K–£728K; units × avg price
Conversion rate: 21.1%
Avg BSR: #208
Page quality: 0%
Prime: 100%
Sponsored: 71%
Out of stock: 8.6%
Avg brand age: 41 months
Avg seller age: 177 days

Competition & brand share

The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.

Brands

14 rising

Sellers

Top-5 brand share

78%

Top 20: 100%

Top-5 click share

78%

Top 20: 100%

Open market

15%

WZ25%
G4GADGET14%
Heatlab14%
Mellbree12%
EQUIP247UK12%
Nartel7%
Open — no brand owns it (8 brands, 15%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -76.8% search growth over the last 90 days.

Peak months: Jan, Feb, Oct, Nov, Dec · busiest ÷ quietest = 21.4×

Open Trend

Top radiator key search terms

radiator key504K/yr -80.8%18.5% conv.
radiator bleed key91K/yr -61.9%19.0% conv.
radiator key bleed key uk37K/yr -62.7%22.3% conv.
radiator valve key11K/yr -62.7%4.2% conv.
bleed key14K/yr -77.3%13.8% conv.
radiator keys9K/yr -72.2%11.9% conv.
radiator bleeding key13K/yr -75.5%13.7% conv.
radiator keys to bleed uk7K/yr -76.6%20.6% conv.
radiator bleed key uk6K/yr -71.4%14.4% conv.
rad key3K/yr -55.6%10.5% conv.

All search terms

Top radiator key 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 14 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

WZ Radiator Bleed Key- Radiator Valve Clock Key for Bleeding and Air Vent- Made of Solid Brass- Pack of 2

WZ£3.994.6★6,811 rev

G4GADGET Radiator Bleed Key 2 Pack Solid Brass Radiator Key for Bleeding & Venting Universal Fit Valve Clock for Home Heating Systems

G4GADGET£2.564.2★1,551 rev

Heatlab The Ultimate Radiator Key - Dual-Sized Imperial & Metric

Heatlab£6.064.7★1,346 rev

3-Piece Solid Brass Radiator Bleed Key Set UK Mellbree Metric/Imperial Fit Hex & Towel Radiator Key Tools for Heating Upkeep

Mellbree£5.034.6★254 rev

Equip247uk Radiator Bleed Key- Radiator Valve Clock Key for Bleeding and Air Vent- Made of Solid Brass- Pack of 2

EQUIP247UK£2.774.6★264 rev

Newest

by launch date

2 Piece Radiators Key Radiator Bleeds Key Radiator Keys Bleed Keys UK Solid Brass Hex & Towel Radiators Bleeding Tools for Plumbers and Home Use for Heating Upkeep Air Vent

Wangqiuqiu£2.702 rev

5mo ago

Gripiti 7 in 1 Radiator Key Meter Box Key Zinc Alloy 4 Way Multi-Functional Utilities Key for Electric Elevator Key Universal Cross Key with Bit Panel Key for Water Gas Meter Opening (Silver)

Gripiti£4.245 rev

8mo ago

RDXMAX Universal Radiator Key Bleed Key UK Radiator Bleed Screw & Radiator Bleeder Tool Radiator Valve Key Plumbers Radiator Key Lockshield Valve Key Radiator Spanner Keys to Bleed

RDXMAX£4.5141 rev

9mo ago

3-Piece Solid Brass Radiator Bleed Key Set UK Mellbree Metric/Imperial Fit Hex & Towel Radiator Key Tools for Heating Upkeep

Mellbree£5.03254 rev

9mo ago

Equip247uk Radiator Bleed Key- Radiator Valve Clock Key for Bleeding and Air Vent- Made of Solid Brass- Pack of 2

EQUIP247UK£2.77264 rev

1y ago

What buyers say about radiator key

What buyers praise and complain about, mined from review topics.

What buyers love

Ease Of Use22%

“EASY TO USE”

Quality-Overall19%

“Excellent Product”

Advertised Vs Actual Product16%

“Works as advertised”

Value For Money12%

“Great value for money”

Size-Overall8%

“Universal fit”

Strength8%

“Good and strong”

Efficiency3%

“Works great”

Grip2%

“Easier to grip”

Design-Overall2%

“design brilliant”

Pressure1%

“I love the metric and imperial options but, best of all, is the long arm which allows more purchase when working on a very stiff valve”

What buyers complain about

Size-Overall30%

“Didnt fit”

Quality-Overall18%

“Poor quality”

Durability15%

“Broke first use”

Grip3%

“didnt grip at all”

Value For Money3%

“they were so cheap it's not worth the hassle”

Functionality-Overall2%

“just didnt work”

Material Quality2%

“Cheap material”

Defective Material/Parts2%

“unless my magnet is defective”

Maintenance And Repair2%

“would need a new radiator”

Locking Mechanism2%

“Would have been good if they had built in lock shield key”

Top return reasons

Size-Overall66%

Functionality-Overall7%

Compatibility-Overall7%

Durability5%

Defective Material/Parts3%

Quality-Overall3%

Ease Of Use2%

Mechanism Issues1%

Leak-Proof1%

Material Quality1%

Common questions

Is radiator key profitable to sell on Amazon United Kingdom?: The niche generates £557K/yr across 14 tracked products. 1 of 4 products launched in the last 360 days are still selling. 90-day search growth is -76.8%. Flapen's verdict: Skip it (45/100).
How competitive is the radiator key niche?: 14 brands and 22 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 78% of demand.
What do buyers complain about in radiator key?: Top complaints mined from reviews: Size-Overall, Quality-Overall, Durability. The return rate is 0.2%.
When does demand for radiator key peak?: Demand peaks in Jan–Feb–Oct–Nov–Dec; the busiest month runs 21.4× the quietest.
What does it cost to enter the radiator key niche?: Listings span £2.32–£6.06; the average listing price is £3.64 (sweet spot $15–$100). The average incumbent carries 1,559 reviews — the moat a new listing must climb.