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55

fuel tank vent

Worth a look

Shows no brand lock-in (top 5 brands take 39% of clicks), but a small market ($45K/yr) keeps it on the watch list.

Market size 11Growth 36Conversion 42Competition 83Returns 83Price range 66Avg price 63Brand share 95Review moat 80Quality gap 33

Brand share

Incredible39%

top-5 brand share — no brand owns this niche

Competition

Great32%

top-5 click share — an open shelf

Returns

Great1.6%

return rate — above 6% kills the launch gate

Review moat

Great406.1

avg incumbent reviews — the moat a new listing must climb

Price range

Good$4.01–$36.14

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

Avg price

Good$13.57

avg listing price — sweet spot $15–$100

Conversion

Okay3.3%

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

Growth

Okay+8.6%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Market size

Bad$45K

$45K/yr · 99K searches

Competition

Clicks spread well past the top 5 (32% combined) — an open shelf where new products get seen.

Brands

46 rising

Sellers

119

Top-5 brand share

39%

Open market

57%

  • Alsoyixia11%
  • Braveboy9%
  • Suspenix8%
  • SEACHOICE7%
  • keehui5%
  • attwood4%

Product shelf

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%3%$1K6%$3K9%$4K12%$5K1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 59 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +8.6% search growth over the last 90 days.
2K2KSpike '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.7×

Reviews

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

What buyers love

Size-Overall22%

“Fit as it should”

Advertised Vs Actual Product14%

“As advertised”

Quality-Overall14%

“Excellent product”

Assembly/Installation9%

“super easy to put on”

Efficiency7%

“It works great”

Value For Money7%

“worth every penny”

Pressure3%

“Works great to ventilate gas can”

Leak-Proof3%

“Nothing leaked”

Ease Of Use3%

“it is really easy to use”

Mounting2%

“Good product easy to mount it comes in two pieces so all you have to do is drill a hole and mount it”

What buyers complain about

Size-Overall16%

“Opening bigger than expected”

Durability8%

“causes it to break”

Advertised Vs Actual Product8%

“Not as pictured”

Quality-Overall7%

“is complete garbage I've had it pop out of my gas can at least 10 different times”

Functionality-Overall7%

“Don't work”

Assembly/Installation5%

“take more to install”

Strength4%

“Fit well felt a little flimsy”

Pressure4%

“The vent doesnt work well”

Leak-Proof3%

“Gas is constantly leaking from the closed vent”

Design-Overall3%

“Not designed well”

Top return reasons

Size-Overall62%
Compatibility-Overall8%
Advertised Vs Actual Product7%
Defective Material/Parts6%
Functionality-Overall6%
Leak-Proof3%
Mounting1%
Color1%
Value For Money1%
Maintenance And Repair1%