Is toilet flapper replacement kit profitable to sell on Amazon United States?

The niche generates $147K/yr across 20 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is +0.5%. Flapen's verdict: Skip it (45/100).

How competitive is the toilet flapper replacement kit niche?

11 brands and 147 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 89% of demand.

What do buyers complain about in toilet flapper replacement kit?

Top complaints mined from reviews: Leak-Proof, Size-Overall, Durability. The return rate is 3.3%.

When does demand for toilet flapper replacement kit peak?

Demand peaks in Aug–Sep; the busiest month runs 13.7× the quietest.

What does it cost to enter the toilet flapper replacement kit niche?

Listings span $6.91–$54.78; the average listing price is $17.04 (sweet spot $15–$100). The average incumbent carries 1,753 reviews — the moat a new listing must climb.

toilet flapper replacement kit

Skip it

Soft demand (+0.5% this quarter) — this niche doesn't clear our bar today.

Conversion

Great9.5%

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

Price range

Great$6.91–$54.78

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

Avg price

Great$17.04

avg listing price — sweet spot $15–$100

Review moat

Okay1,753.4

avg incumbent reviews — the moat a new listing must climb

Returns

Okay3.3%

return rate — above 5% kills the launch gate

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Competition

Okay62%

top-5 click share — leaders hold, buyers still browse

Market size

Okay$147K

$147K/yr · 90K searches

Brand share

Okay89%

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

Growth

Okay+0.5%

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

According to Flapen's Amazon United States niche tracking, toilet flapper replacement kit is a $147K/yr Amazon United States market (90K searches/yr). The top 5 brands hold 89% of demand. Demand peaks in Aug–Sep. Verdict: Skip it — 45/100.

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

toilet flapper replacement kit market data

Units sold / yr: 8K–10K; avg 250–500/product
Revenue / yr: $136K–$170K; units × avg price
Conversion rate: 9.5%
Avg BSR: #2,216
Page quality: 0%
Prime: 100%
Sponsored: 65%
Out of stock: 2.6%
Avg brand age: 36 months
Avg seller age: 127 days

Competition & brand share

The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.

Brands

11 falling

Sellers

147

Top-5 brand share

89%

Top 20: 100%

Top-5 click share

62%

Top 20: 100%

Open market

American Standard56%
Korky15%
Hidnvefen12%
R1L3X1NG3%
senylanhxy3%
Fluidmaster2%
Open — no brand owns it (5 brands, 9%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +0.5% search growth over the last 90 days.

Peak months: Aug, Sep · busiest ÷ quietest = 13.7×

Open Trend

Top toilet flapper replacement kit search terms

american standard toilet flapper69K/yr +0.1%8.0% conv.
american standard flapper9K/yr +1.8%7.3% conv.
american standard toilet flapper replacement5K/yr -10.9%6.5% conv.
american standard flapper replacement4K/yr +35.4%6.2% conv.
toilet flapper american standard3K/yr -8.4%8.1% conv.

All search terms

Top toilet flapper replacement kit 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 20 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

American Standard Toilet Tank Seal Champion Flush Valve Gasket Replacement

American Standard$17.894.5★415 rev

American Standard 7381129-200.0070A Universal Flapper and Chain with Float for 2-Inch Flush Valves Black

American Standard$16.914.3★1,375 rev

Korky Ultra Standard 2-Inch Universal Toilet Flapper - Long Lasting Rubber - Easy to Install - Made in USA 100BP

Korky$6.914.5★15,115 rev

American Standard 7381193-200.0070A 3-Inch Toilet Tank Flapper Valve Set

American Standard$9.584.4★685 rev

Flush Valve Seal for American Standard & Eljer Toilets Upgraded Silicone Material 7301111-0070A American Standard Toilet Parts Replacement with O Rings for Champion 4 and Eljer Titan 4 2Pcs

Hidnvefen$8.024.6★669 rev

Newest

by launch date

American Standard 7381657-200.0070A Toilet Flapper Replacement Kit

UAOPL$22.837 rev

3mo ago

American Standard Toilet Flapper Replacement Kit 7381657-200.0070A

RMYSTIEAO$22.8725 rev

7mo ago

American Standard 4 Champion Universal Flush Valve Kit Genuine OEM Part Fits All 2-Piece Champion Toilets Includes Wrench Lock Nut & Extra Flapper (Model 7382106-100.0070A)

American Standard$54.7846 rev

7mo ago

738042-0070A Toilet Flush Valve Compatible with American Standard ACTUATING UNIT not provided Toilet Flush Valve Flapper Replacement Kits

UCDETD$28.628 rev

9mo ago

Toilet Flapper Replacement Kit for Vormax Compatible with American Standard Vormax Toilets Black

R1L3X1NG$23.10102 rev

1y ago

What buyers say about toilet flapper replacement kit

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

What buyers love

Assembly/Installation21%

“EASY TO INSTALL”

Size-Overall14%

“Fit perfect”

Advertised Vs Actual Product10%

“As advertised”

Leak-Proof10%

“This one does not leak”

Quality-Overall8%

“Excellent product”

Value For Money7%

“Great Deal”

Efficiency6%

“Works great”

Ease Of Use5%

“Easy peasy”

Maintenance And Repair3%

“reducing future repairs”

Durability2%

“Reliable performance and great durability—definitely recommend”

What buyers complain about

Leak-Proof23%

“It leaks”

Size-Overall11%

“Very small”

Durability9%

“Not durable”

Functionality-Overall6%

“Not likely to work”

Assembly/Installation5%

“took a little time to install”

Quality-Overall4%

“Very bad quality”

Value For Money3%

“WASTE OF MONEY”

Design-Overall2%

“The original design is a poor attempt at water conservation”

Product Condition2%

“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.”

Water Resistance2%

“The original design is a poor attempt at water conservation”

Top return reasons

Size-Overall78%

Compatibility-Overall4%

Defective Material/Parts4%

Advertised Vs Actual Product3%

Functionality-Overall3%

Leak-Proof3%

Value For Money1%

Assembly/Installation1%

Product Condition1%

Material Quality1%

Common questions

Is toilet flapper replacement kit profitable to sell on Amazon United States?: The niche generates $147K/yr across 20 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is +0.5%. Flapen's verdict: Skip it (45/100).
How competitive is the toilet flapper replacement kit niche?: 11 brands and 147 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 89% of demand.
What do buyers complain about in toilet flapper replacement kit?: Top complaints mined from reviews: Leak-Proof, Size-Overall, Durability. The return rate is 3.3%.
When does demand for toilet flapper replacement kit peak?: Demand peaks in Aug–Sep; the busiest month runs 13.7× the quietest.
What does it cost to enter the toilet flapper replacement kit niche?: Listings span $6.91–$54.78; the average listing price is $17.04 (sweet spot $15–$100). The average incumbent carries 1,753 reviews — the moat a new listing must climb.