Is toto toilet flapper profitable to sell on Amazon United States?

The niche generates $147K/yr across 9 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +3.7%. Flapen's verdict: Skip it (43/100).

How competitive is the toto toilet flapper niche?

8 brands and 77 sellers compete. The top 5 products take 83% of clicks and top 5 brands hold 88% of demand.

What do buyers complain about in toto toilet flapper?

Top complaints mined from reviews: Leak-Proof, Size-Overall, Durability. The return rate is 4.8%.

When does demand for toto toilet flapper peak?

Demand peaks in Aug–Sep; the busiest month runs 3.5× the quietest.

What does it cost to enter the toto toilet flapper niche?

Listings span $7.50–$38.43; the average listing price is $15.73 (sweet spot $15–$100). The average incumbent carries 1,871 reviews — the moat a new listing must climb.

toto toilet flapper

Skip it

A concentrated shelf (top 5 take 83% of clicks) — this niche doesn't clear our bar today.

Conversion

Incredible16.2%

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

Avg price

Great$15.73

avg listing price — sweet spot $15–$100

Price range

Great$7.50–$38.43

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Review moat

Okay1,871.33

avg incumbent reviews — the moat a new listing must climb

Market size

Okay$147K

$147K/yr · 57K searches

Growth

Okay+3.7%

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

Brand share

Okay88%

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

Returns

Okay4.8%

return rate — above 5% kills the launch gate

Competition

Bad83%

top-5 click share — a locked-up shelf

According to Flapen's Amazon United States niche tracking, toto toilet flapper is a $147K/yr Amazon United States market (57K searches/yr). The top 5 brands hold 88% of demand. Demand peaks in Aug–Sep. Verdict: Skip it — 43/100.

Data updated Jul 29, 2026 · scored weekly · How we score niches

toto toilet flapper market data

Units sold / yr: 8K–10K; avg 250–500/product
Revenue / yr: $126K–$157K; units × avg price
Conversion rate: 16.2%
Avg BSR: #641
Page quality: 0%
Prime: 100%
Sponsored: 67%
Out of stock: 8.0%
Avg brand age: 47 months
Avg seller age: 142 days

Competition & brand share

The top 5 products capture 83% of clicks — a locked-up shelf that new listings rarely crack.

Brands

8 flat

Sellers

Top-5 brand share

88%

Top 20: 100%

Top-5 click share

83%

Top 20: 100%

Open market

TOTO46%
Korky17%
Essential Values14%
iFealClear6%
Hibbent5%
WELCAPAC5%
Open — no brand owns it (2 brands, 8%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +3.7% search growth over the last 90 days.

Peak months: Aug, Sep · busiest ÷ quietest = 3.5×

Open Trend

Top toto toilet flapper search terms

toto flapper replacement16K/yr -3.3%12.7% conv.
toto toilet flapper18K/yr -9.2%12.0% conv.
toto toilet flapper replacement11K/yr +33.2%13.1% conv.
toto flapper12K/yr +3.7%10.7% conv.

All search terms

Top toto toilet flapper 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 9 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

TOTO Replacement Flapper for Select TOTO 3 Inch Flush Valve Tanks - THU500S

TOTO$20.974.6★3,320 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 2021BP G-Max Flapper For TOTO Toilet Repairs - Large 3-Inch Flapper - Easy to Install - Made in USA

Korky$11.284.3★3,562 rev

3-Inch Toilet Flapper Compatible with TOTO THU140S Flappers CST854 Toilets

iFealClear$10.104.4★827 rev

Hibbent 2 Pack Large 3-Inch Toilet Flapper Replacement Compatible with TOTO flapper Model G-Max THU138S THU175S and THU331S- Oversized Sealing and Easy to Install

Hibbent$22.174.4★1,295 rev

Newest

by launch date

WELCAPAC TO.TO 3-Inch Toilet Flapper Replacement - Compatible with TOTO G-Max THU138S THU175S THU331S | Oversized Sealing Ring Water-Saving Design Stainless Steel Chain

WELCAPAC$9.3922 rev

10mo ago

1 Pack 3-Inch Toilet Flapper Replacement Compatible with TOTO Flapper Model G-Max THU138S THU175S and THU331S

OasisFlow$10.0147 rev

1y ago

3-Inch Toilet Flapper Compatible with TOTO THU140S Flappers CST854 Toilets

iFealClear$10.10827 rev

6y ago

Hibbent 2 Pack Large 3-Inch Toilet Flapper Replacement Compatible with TOTO flapper Model G-Max THU138S THU175S and THU331S- Oversized Sealing and Easy to Install

Hibbent$22.171,295 rev

6y ago

TOTO Replacement Flapper for Select TOTO 3 Inch Flush Valve Tanks - THU500S

TOTO$20.973,320 rev

8y ago

What buyers say about toto toilet flapper

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

What buyers love

Assembly/Installation20%

“Easy install”

Size-Overall16%

“Exact fit”

Quality-Overall14%

“Excellent Quality”

Advertised Vs Actual Product12%

“As advertised”

Value For Money9%

“Reasonably priced”

Efficiency6%

“Works great”

Leak-Proof3%

“has not leaked once”

Instructions/User Manual/Troubleshooting2%

“Works well, make sure you have the complete instructions”

Durability2%

“its held up great”

Ease Of Use1%

“is easy to do”

What buyers complain about

Leak-Proof23%

“leaked a bit”

Size-Overall15%

“it is too big”

Durability9%

“Broken”

Quality-Overall7%

“This flapper is junk”

Assembly/Installation6%

“Did not install it”

Value For Money5%

“it's definitely not as good as the Korky replacements at twice the price”

Compatibility-Overall4%

“I checked the compatibility and it was THU175S”

Maintenance And Repair3%

“much cheaper than hiring a plumber to fix”

Spray/Flow3%

“Does not stop the water flow”

Strength2%

“it isn't built as sturdy as toto”

Top return reasons

Size-Overall77%

Defective Material/Parts5%

Compatibility-Overall5%

Leak-Proof3%

Advertised Vs Actual Product3%

Functionality-Overall2%

Material Quality1%

Value For Money1%

Add-Ons/Attachments1%

Product Condition1%

Common questions

Is toto toilet flapper profitable to sell on Amazon United States?: The niche generates $147K/yr across 9 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +3.7%. Flapen's verdict: Skip it (43/100).
How competitive is the toto toilet flapper niche?: 8 brands and 77 sellers compete. The top 5 products take 83% of clicks and top 5 brands hold 88% of demand.
What do buyers complain about in toto toilet flapper?: Top complaints mined from reviews: Leak-Proof, Size-Overall, Durability. The return rate is 4.8%.
When does demand for toto toilet flapper peak?: Demand peaks in Aug–Sep; the busiest month runs 3.5× the quietest.
What does it cost to enter the toto toilet flapper niche?: Listings span $7.50–$38.43; the average listing price is $15.73 (sweet spot $15–$100). The average incumbent carries 1,871 reviews — the moat a new listing must climb.