toilet flapper 3 inch
Skip itA concentrated shelf (top 5 take 75% of clicks) — this niche doesn't clear our bar today.
Conversion
Incredible15.5%search→purchase rate — share of searches ending in a sale
Market size
Good$389K$389K/yr · 216K searches
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Review moat
Okay1,721.14avg incumbent reviews — the moat a new listing must climb
Avg price
Okay$11.67avg listing price — sweet spot $15–$100
Price range
Okay$5.86–$22.85cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Okay+10.1%90-day search growth — must beat 0% to launch
Brand share
Okay87%top-5 brand share — brands hold most of the demand
Returns
Bad5.6%return rate — above 5% kills the launch gate
Competition
Bad75%top-5 click share — a locked-up shelf
According to Flapen's Amazon United States niche tracking, toilet flapper 3 inch is a $389K/yr Amazon United States market (216K searches/yr). The top 5 brands hold 87% of demand. Demand peaks in Aug. Verdict: Skip it — 44/100.
Data updated Jul 29, 2026 · scored weekly · How we score niches
toilet flapper 3 inch market data
- Units sold / yr
- 30K–40K
- avg 2,500–3,000/product
- Revenue / yr
- $350K–$467K
- units × avg price
- Conversion rate
- 15.5%
- Avg BSR
- #697
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 93%
- Out of stock
- 7.7%
- Avg brand age
- 44 months
- Avg seller age
- 146 days
Competition & brand share
The top 5 products capture 75% of clicks — a locked-up shelf that new listings rarely crack.Brands
10 flat
Sellers
85
Top-5 brand share
87%
Top 20: 100%
Top-5 click share
75%
Top 20: 100%
Open market
10%
- Korky43%
- Fluidmaster23%
- Lceyco9%
- Essential Values8%
- Ankiwi4%
- iFealClear3%
- Open — no brand owns it (4 brands, 10%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +10.1% search growth over the last 90 days.Peak months: Aug · busiest ÷ quietest = 1.7×
Top toilet flapper 3 inch search terms
- toilet flapper 3 inch65K/yr
- 3 inch toilet flapper30K/yr
- fluidmaster 540 flapper16K/yr
- 3 toilet flapper replacement12K/yr
- 3 inch flapper9K/yr
- korky 3 inch universal flapper9K/yr
- 3 toilet flapper9K/yr
- fluidmaster model 540 flapper5K/yr
- 3 flapper for toilet tank7K/yr
- 3 inch flapper for toilet tank8K/yr
Top toilet flapper 3 inch 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 14 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Korky Large 3-Inch Premium Universal Toilet Flapper
Korky$11.754.5★4,165 rev
Fluidmaster 5403 3-Inch Water Saving Long Life Toilet Flapper
Fluidmaster$12.154.5★7,391 rev
Gerber Toilet Flapper Replacement 2 Pack 3 inch for Gerber 99-788 with 2 Toilet Handle Chains Lecyco Rubber Water Saving Easy to Install 2
Lceyco$9.944.4★997 rev
Essential Values Toto Toilet Replacement Parts - Compatible with 3 Toto Toilet Flapper For G-Max THU499S THU331S THU175S & 2021BP Models
Essential Values$7.504.3★3,403 rev
Korky 3070BP Large 3 2X High Performance Universal Toilet Flapper Red
Korky$15.504.5★362 rev
Newest
by launch date
Ankiwi Universal 3 Toilet Flapper Replacement - Water Saving & Leak-Proof
Ankiwi$7.0938 rev
3 Inch Toilet Flapper Replacementfit 3 Inch Opening Flush Valves ToiletsCompatible with Gerber 99-788 Lowes AquaSource: 1.28 GPF Toilets 98923
DUMEALAGR$5.86123 rev
Korky Large 3-Inch Toilet Flapper - Easy to Install - Made in USA 3062 (2)
Korky$22.85131 rev
Korky 3070BP Large 3 2X High Performance Universal Toilet Flapper Red
Korky$15.50362 rev
Gerber Toilet Flapper Replacement 2 Pack 3 inch for Gerber 99-788 with 2 Toilet Handle Chains Lecyco Rubber Water Saving Easy to Install 2
Lceyco$9.94997 rev
Trending
90-day click momentumAnkiwi Universal 3 Toilet Flapper Replacement - Water Saving & Leak-Proof
Ankiwi$7.094.4★
3 Inch Toilet Flapper Replacement 2 Pack Compatible with Gerber 99-788
Lydia's Deal$9.494.1★
Essential Values Toto Toilet Replacement Parts - Compatible with 3 Toto Toilet Flapper For G-Max THU499S THU331S THU175S & 2021BP Models
Essential Values$7.504.3★
Korky Large 3-Inch Toilet Flapper - Easy to Install - Made in USA 3062 (2)
Korky$22.854.6★
3 Inch Toilet Flapper Replacementfit 3 Inch Opening Flush Valves ToiletsCompatible with Gerber 99-788 Lowes AquaSource: 1.28 GPF Toilets 98923
DUMEALAGR$5.864.4★
What buyers say about toilet flapper 3 inch
What buyers praise and complain about, mined from review topics.What buyers love
“Great install”
“Fit perfect”
“As advertised”
“Excellent product”
“Great value”
“Works best on Gerber toilets”
“Easy to use”
“It is also a leak proof”
“It seems like it has good durability”
“Adjustable”
What buyers complain about
“Leaked constantly”
“Size was too small”
“they does not seem to be durable”
“Poor quality”
“didn't work properly”
“There was no way to install it”
“Not for Gerber toilets”
“Item looks new but disappointed it came in this condition. It was in a larger box with other items. It looks to have previously cut open. Taped closed.”
“Cheap and filmsy”
“it isn't built as sturdy as toto”
Top return reasons
Common questions
- Is toilet flapper 3 inch profitable to sell on Amazon United States?
- The niche generates $389K/yr across 14 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +10.1%. Flapen's verdict: Skip it (44/100).
- How competitive is the toilet flapper 3 inch niche?
- 10 brands and 85 sellers compete. The top 5 products take 75% of clicks and top 5 brands hold 87% of demand.
- What do buyers complain about in toilet flapper 3 inch?
- Top complaints mined from reviews: Leak-Proof, Size-Overall, Durability. The return rate is 5.6% — above our launch gate.
- When does demand for toilet flapper 3 inch peak?
- Demand peaks in Aug; the busiest month runs 1.7× the quietest.
- What does it cost to enter the toilet flapper 3 inch niche?
- Listings span $5.86–$22.85; the average listing price is $11.67 (sweet spot $15–$100). The average incumbent carries 1,721 reviews — the moat a new listing must climb.