radiator key
Skip itSoft demand (-86.4% this quarter) — this niche doesn't clear our bar today.
Returns
Great1.3%return rate — above 5% kills the launch gate
Conversion
Great7.5%search→purchase rate — share of searches ending in a sale
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Brand share
Good61%top-5 brand share — brands hold most of the demand
Review moat
Good605.57avg incumbent reviews — the moat a new listing must climb
Competition
Good50%top-5 click share — leaders hold, buyers still browse
Avg price
Bad$7.52avg listing price — sweet spot $15–$100
Market size
Bad$40K$40K/yr · 70K searches
Growth
Bad-86.4%90-day search growth — must beat 0% to launch
Price range
Bad$2.46–$12.22cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United States niche tracking, radiator key is a $40K/yr Amazon United States market (70K searches/yr). The top 5 brands hold 61% of demand. Demand peaks in Jan–Feb–Oct–Nov–Dec. Verdict: Skip it — 47/100.
Data updated Jul 9, 2026 · scored weekly · How we score niches
radiator key market data
- Units sold / yr
- 8K–10K
- avg 250–500/product
- Revenue / yr
- $60K–$75K
- units × avg price
- Conversion rate
- 7.5%
- Avg BSR
- #6,655
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 67%
- Out of stock
- 3.2%
- Avg brand age
- 41 months
- Avg seller age
- 185 days
Competition & brand share
The top 5 products take 50% of clicks — established leaders, but buyers still shop beyond them.Brands
18 rising
Sellers
36
Top-5 brand share
61%
Top 20: 100%
Top-5 click share
50%
Top 20: 99%
Open market
32%
- Hayatooly20%
- BRBASAP14%
- FDXGYH11%
- DURATECH8%
- TOYMIS7%
- HTBMALL7%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -86.4% search growth over the last 90 days.Peak months: Jan, Feb, Oct, Nov, Dec · busiest ÷ quietest = 37.8×
Top radiator key search terms
- radiator key30K/yr
- radiator bleed key15K/yr
- radiator keys for bleeding old home radiator13K/yr
- radiator bleeder key5K/yr
- radiator keys for bleeding5K/yr
- key to bleed radiators3K/yr
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.
All 21 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
BRBASAP 3 Packs Radiator Key with 1 Rings Bleeder Keys for Bleeding Old Home Radiator Air Valve Durable Handle Tool to Turn Off Water Valves Bleed Keys for Home Radiator Maintenance and Repairs
BRBASAP$6.634.6★38 rev
Hayatooly 4-Way Water Key Premium Sillcock Key Radiator Bleeder Key Multi-Functional Shut off Tool for 1/4 9/32 5/16 11/32 Valve & Spigot Ideal for Home Public & Commercial
Hayatooly$9.104.7★58 rev
Hayatooly Sillcock Key and Radiator Key Set (6-Piece) - Includes 2 Water Meter Keys & 4 Bleeder Valves for 1/4 9/32 5/16 11/32 Inch Outdoor Faucets Spigots and Radiators - Home & Commercial
Hayatooly$9.734.6★51 rev
DURATECH 4 Way Sillcock Key Set Utility Key Multi-functional Water Key 2-Pack for Valve Faucet and Spigots
DURATECH$12.224.7★2,533 rev
TOYMIS 6Pcs Radiator Valve Keys Radiator Bleed Hole Key Radiator Vent Air Valve Key Plumbing Valve Key for Radiators and Faucet (Silver)
TOYMIS$6.804.4★351 rev
Newest
by launch date
FDXGYH 4 Pcs Radiator Keys Radiator Bleeding Air Valve Keys Zinc Alloy Radiator On-off Valve Replacement for Bleeding Home Radiators (Black)
FDXGYH$6.461 rev
FDXGYH 4 Pcs Radiator Keys Radiator Bleeding Air Valve Keys Zinc Alloy Radiator On-off Valve Replacement for Bleeding Home Radiators (T-Type)
FDXGYH$7.781 rev
Hayatooly 4-Way Water Key Premium Sillcock Key Radiator Bleeder Key Multi-Functional Shut off Tool for 1/4 9/32 5/16 11/32 Valve & Spigot Ideal for Home Public & Commercial
Hayatooly$9.1058 rev
Hayatooly Sillcock Key and Radiator Key Set (6-Piece) - Includes 2 Water Meter Keys & 4 Bleeder Valves for 1/4 9/32 5/16 11/32 Inch Outdoor Faucets Spigots and Radiators - Home & Commercial
Hayatooly$9.7351 rev
10Pcs Radiator Bleeding Air Valve Key Bleed Hole Keys for Home Radiator Hot Water Flush Plumbing Tool Replacement Silver
HTBMALL$6.242 rev
Trending
90-day click momentumHayatooly 4-Way Water Key Premium Sillcock Key Radiator Bleeder Key Multi-Functional Shut off Tool for 1/4 9/32 5/16 11/32 Valve & Spigot Ideal for Home Public & Commercial
Hayatooly$9.104.7★
FDXGYH 4 Pcs Radiator Keys Radiator Bleeding Air Valve Keys Zinc Alloy Radiator On-off Valve Replacement for Bleeding Home Radiators (Black)
FDXGYH$6.463.0★
FDXGYH 4 Pcs Radiator Keys Radiator Bleeding Air Valve Keys Zinc Alloy Radiator On-off Valve Replacement for Bleeding Home Radiators (T-Type)
FDXGYH$7.783.0★
Radiator Bleed Key Alloy Steel Vent Valve Handle Imperial and Metric Square Key for All 5 x 5 mm Valve Standard Radiators
LiebeWH$10.584.0★
Hayatooly Sillcock Key and Radiator Key Set (6-Piece) - Includes 2 Water Meter Keys & 4 Bleeder Valves for 1/4 9/32 5/16 11/32 Inch Outdoor Faucets Spigots and Radiators - Home & Commercial
Hayatooly$9.734.6★
What buyers say about radiator key
What buyers praise and complain about, mined from review topics.What buyers love
“comes in handy”
“Good quality”
“The sizes are accurate”
“As advertised”
“Its so worth the price”
“the durable construction handles regular use without bending or wearing out”
“Built strong”
“Handy to have”
“Highly practical and essential maintenance kit”
“rust-resistant design keeps everything organized”
What buyers complain about
“Didn't fit”
“Cast not steel”
“Not so strong”
“Poor quality”
“breaks very easy”
“Doesn't work”
“were too thick to fit in the slot in the radiator”
“are a little difficult to see”
“The metallic key is significantly heavier”
Top return reasons
Common questions
- Is radiator key profitable to sell on Amazon United States?
- The niche generates $40K/yr across 21 tracked products. 0 of 8 products launched in the last 360 days are still selling. 90-day search growth is -86.4%. Flapen's verdict: Skip it (47/100).
- How competitive is the radiator key niche?
- 18 brands and 36 sellers compete. The top 5 products take 50% of clicks and top 5 brands hold 61% of demand.
- What do buyers complain about in radiator key?
- Top complaints mined from reviews: Size-Overall, Metal Quality, Strength. The return rate is 1.3%.
- When does demand for radiator key peak?
- Demand peaks in Jan–Feb–Oct–Nov–Dec; the busiest month runs 37.8× the quietest.
- What does it cost to enter the radiator key niche?
- Listings span $2.46–$12.22; the average listing price is $7.52 (sweet spot $15–$100). The average incumbent carries 606 reviews — the moat a new listing must climb.