Is sloan flushmate cartridge profitable to sell on Amazon United States?

The niche generates $119K/yr across 15 tracked products. 1 of 4 products launched in the last 360 days are still selling. 90-day search growth is +31.9%. Flapen's verdict: Worth a look (57/100).

How competitive is the sloan flushmate cartridge niche?

10 brands and 17 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 88% of demand.

What do buyers complain about in sloan flushmate cartridge?

Top complaints mined from reviews: Durability, Functionality-Overall, Leak-Proof. The return rate is 3.7%.

When does demand for sloan flushmate cartridge peak?

Demand is steady year-round — the busiest month runs 1.5× the quietest.

What does it cost to enter the sloan flushmate cartridge niche?

Listings span $13.49–$72.90; the average listing price is $42.17 (sweet spot $15–$100). The average incumbent carries 152 reviews — the moat a new listing must climb.

sloan flushmate cartridge

Worth a look

Shows beatable incumbent ratings (3.3★), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Quality gap

Incredible3.3★

avg incumbent rating — lower means beatable quality

Conversion

Incredible16.0%

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

Avg price

Incredible$42.17

avg listing price — sweet spot $15–$100

Price range

Great$13.49–$72.90

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

Review moat

Great152

avg incumbent reviews — the moat a new listing must climb

Growth

Good+31.9%

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

Returns

Okay3.7%

return rate — above 5% kills the launch gate

Brand share

Okay88%

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

Market size

Okay$119K

$119K/yr · 18K searches

Competition

Bad71%

top-5 click share — a locked-up shelf

Signals Quality Gap

According to Flapen's Amazon United States niche tracking, sloan flushmate cartridge is a $119K/yr Amazon United States market (18K searches/yr). The top 5 brands hold 88% of demand. Verdict: Worth a look — 57/100.

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

sloan flushmate cartridge market data

Units sold / yr: 3K–3K; avg 250–500/product
Revenue / yr: $105K–$127K; units × avg price
Conversion rate: 16.0%
Avg BSR: #5,144
Page quality: 0%
Prime: 93%
Sponsored: 100%
Out of stock: 8.4%
Avg brand age: 25 months
Avg seller age: 181 days

Competition & brand share

The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.

Brands

10 rising

Sellers

Top-5 brand share

88%

Top 20: 100%

Top-5 click share

71%

Top 20: 100%

Open market

Flushmate36%
Saiyugty23%
Edifla19%
Ussuray5%
AAQR5%
MEOZXIXT5%
Open — no brand owns it (4 brands, 8%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +31.9% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.5×

Open Trend

Top sloan flushmate cartridge search terms

flushmate 503 cartridge10K/yr +49.8%11.3% conv.
flushmate cartridge3K/yr +14.8%7.8% conv.
sloan flushmate cartridge4K/yr -5.4%13.1% conv.

All search terms

Top sloan flushmate cartridge 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 15 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Flushmate C-100500-KIT OEM Replacement Flush Valve Cartridge for Flushmate 500 501 503 504 Pressure Assist Systems - Duckbill Valve Filter Screen & Lower Supply Filter 1.0 & 1.6 GPF Systems

Flushmate$38.484.6★1,650 rev

C-100500-K Flush Valve Cartridge Assembly for 500 501 501A 501B 503 504 Series Tank System Compatible with M-101526-F3 M-101526-F4 Pressure Assist Tank

Edifla$37.223.7★79 rev

C-100500-K C-100500-Kit Replacement Cartridge Kit Flush Valve Cartridge Assembly Kit Compatible with m-101526-f3 503 504 Cartridge White 1 Pack

Saiyugty$34.543.8★136 rev

Upgraded C-100500-K C-100500-Kit Flush Valve Cartridge Assembly Kit Compatible with m-101526-f3 503 504 Series Duct Valve 1 Pack

Saiyugty$37.393.8★154 rev

Flushmate C-100501-KIT Replacement Flush Valve Cartridge for Flushmate 503H Pressure Assist Systems - Includes Duckbill Valve Filter Screen & Lower Supply Filter 1.28 GPF Systems OEM Part

Flushmate$49.454.3★11 rev

Newest

by launch date

C-100500-K Flush Valve Cartridge Kit Fits Sloan Flushmate M-101526-F3

MEOZXIXT$34.592 rev

3mo ago

C-100500-K Flush Valve Cartridge for Flushmate 503 504 500 501 Series

AAQR$35.647 rev

3mo ago

Upgraded Flush Valve Cartridge KitReplacement for C-100500-K C-100500-KIT Compatible with 500 501 501A 501B 503 504 Series Pressure Assist Systems Fits M-101526-F3/F4 Tanks for 1.0 & 1.6 GPF

AOMRRIU$34.909 rev

6mo ago

C-100500-K Flush Valve Cartridge Assembly Kit Replacement for Flushmate 500 501 503 504 Series Pressure Assist Tank Fits M-101526-F3 M-101526-F4 (2PCS)

Yoursme$58.301 rev

6mo ago

Replacement for Sloan Flushmate C-100500-Kit cartridge kit C-100500-K Flush Valve Cartridge Kit Fits for M-101526-F3 M-101526-F4 and 504 Series Tank System

Ussuray$28.7721 rev

1y ago

What buyers say about sloan flushmate cartridge

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

What buyers love

Assembly/Installation15%

“Easy to install”

Size-Overall12%

“Fits perfectly”

Value For Money9%

“much cheaper than calling a plumber”

Efficiency8%

“Works great”

Ease Of Use6%

“Easy to use”

Leak-Proof6%

“Doesnt leak, fast installation, and speedy delivery from AMazon as well”

Advertised Vs Actual Product5%

“As advertised”

Quality-Overall5%

“This product is well made”

Instructions/User Manual/Troubleshooting5%

“Instructions were good and clear”

Pressure4%

“Easy replacement for pressure assist toilets”

What buyers complain about

Durability17%

“A very lightly used two months”

Functionality-Overall14%

“It did not solve my problem”

Leak-Proof14%

“Leaked”

Quality-Overall10%

“Poor quality part”

Value For Money5%

“Costs a bit more”

Maintenance And Repair4%

“needs frequent replacement”

Defective Material/Parts4%

“DEFECTIVE PART”

Assembly/Installation4%

“I double-checked the installation”

Size-Overall3%

“BAD FITTING CARTRIDGE”

Adhesion/Stickiness2%

“Now it sticks”

Top return reasons

Size-Overall20%

Functionality-Overall20%

Defective Material/Parts18%

Leak-Proof12%

Compatibility-Overall8%

Assembly/Installation4%

Product Condition2%

Water Resistance2%

Value For Money2%

Maintenance And Repair2%

Common questions

Is sloan flushmate cartridge profitable to sell on Amazon United States?: The niche generates $119K/yr across 15 tracked products. 1 of 4 products launched in the last 360 days are still selling. 90-day search growth is +31.9%. Flapen's verdict: Worth a look (57/100).
How competitive is the sloan flushmate cartridge niche?: 10 brands and 17 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 88% of demand.
What do buyers complain about in sloan flushmate cartridge?: Top complaints mined from reviews: Durability, Functionality-Overall, Leak-Proof. The return rate is 3.7%.
When does demand for sloan flushmate cartridge peak?: Demand is steady year-round — the busiest month runs 1.5× the quietest.
What does it cost to enter the sloan flushmate cartridge niche?: Listings span $13.49–$72.90; the average listing price is $42.17 (sweet spot $15–$100). The average incumbent carries 152 reviews — the moat a new listing must climb.