---
title: "Sloan Flushmate Cartridge — $119K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/sloan-flushmate-cartridge"
last_updated: "2026-08-08T14:35:41.026Z"
locale: en
meta:
description: "Niche score 57/100 · $119K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 57/100 · $119K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Sloan Flushmate Cartridge — $119K/yr Amazon US Niche (2026) - Flapen"
---
# **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.
Market size 28Growth 57Conversion 97Competition 24Returns 42Price range 93Avg price 95Brand share 29Review moat 92Quality gap 100
**Quality gap**
**Incredible****3.3★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Incredible****16.0%**
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**
**Great****152**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Good****+31.9%**
90-day search growth — must beat 0% to launch
**Returns**
**Okay****3.7%**
return rate — above 5% kills the launch gate
**Brand share**
**Okay****88%**
top-5 brand share — brands hold most of the demand
**Market size**
**Okay****$119K**
$119K/yr · 18K searches
**Competition**
**Bad****71%**
top-5 click share — a locked-up shelf
**Signals**[** Quality Gap**](https://flapen.com/research/niches?market=us&signal=quality_gap "Avg rating < 4.0")
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 ~~](https://flapen.com/research/methodology)
## **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**
**17**
**Top-5 brand share**
**88%**
Top 20: 100%
**Top-5 click share**
**71%**
Top 20: 100%
**Open market**
**8%**
- 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.
450350Spike '24Spike '25Prime Day '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.5×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/sloan-flushmate-cartridge/trend)
## **Top sloan flushmate cartridge search terms**
- **flushmate 503 cartridge**10K/yr+49.8%11.3% conv. - **flushmate cartridge**3K/yr+14.8%7.8% conv. - **sloan flushmate cartridge**4K/yr-5.4%13.1% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/sloan-flushmate-cartridge/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.
0%10%$12K20%$24K30%$36K40%$48K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**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**$38.48**4.6★1,650 rev](https://www.amazon.com/dp/B000NPKLAQ) [2**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**$37.22**3.7★79 rev](https://www.amazon.com/dp/B0D3YNGFC9) [3**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**$34.54**3.8★136 rev](https://www.amazon.com/dp/B0CJ28HK6Q) [4**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**$37.39**3.8★154 rev](https://www.amazon.com/dp/B0CMG7MZ41) [5**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**$49.45**4.3★11 rev](https://www.amazon.com/dp/B00CEICNR4)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**C-100500-K Flush Valve Cartridge Kit Fits Sloan Flushmate M-101526-F3**MEOZXIXT**$34.59**2 rev3mo ago](https://www.amazon.com/dp/B0GWMF7BR1) [**C-100500-K Flush Valve Cartridge for Flushmate 503 504 500 501 Series**AAQR**$35.64**7 rev3mo ago](https://www.amazon.com/dp/B0GWCYVFZ8) [**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**$34.90**9 rev6mo ago](https://www.amazon.com/dp/B0GHMT8S27) [**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**$58.30**1 rev6mo ago](https://www.amazon.com/dp/B0GF7KSPBW) [**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**$28.77**21 rev1y ago](https://www.amazon.com/dp/B0FFB7NQYG)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**C-100500-K Flush Valve Cartridge Kit Fits Sloan Flushmate M-101526-F3**MEOZXIXT**$34.59**1.0★**▲ 227%**](https://www.amazon.com/dp/B0GWMF7BR1) [**C-100500-K Flush Valve Cartridge for Flushmate 503 504 500 501 Series**AAQR**$35.64**2.8★**▲ 225%**](https://www.amazon.com/dp/B0GWCYVFZ8) [**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**$58.30**1.0★**▲ 224%**](https://www.amazon.com/dp/B0GF7KSPBW) [**BOVZOR C-100500-K C-100500-Kit Flush Valve Cartridge M-101526-F3 (1 Pack)**bovzor**$33.73**1.8★**▲ 170%**](https://www.amazon.com/dp/B0GJRXQMQW) [**2Pack C-100500-K Flush Valve Cartridge Assembly for 500 501 501A 501B 503 504 Series 503/504 Cartridge Compatible with M-101526-F3 M-101526-F4 Assist Tank**Edifla**$71.67**4.0★**▲ 106%**](https://www.amazon.com/dp/B0D3YX1PN5)
**~~View all trending →~~**
## **What buyers say about sloan flushmate cartridge**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Assembly/Installation**15%
*“Easy to install”*
**Size-Overall**12%
*“Fits perfectly”*
**Value For Money**9%
*“much cheaper than calling a plumber”*
**Efficiency**8%
*“Works great”*
**Ease Of Use**6%
*“Easy to use”*
**Leak-Proof**6%
*“Doesnt leak, fast installation, and speedy delivery from AMazon as well”*
**Advertised Vs Actual Product**5%
*“As advertised”*
**Quality-Overall**5%
*“This product is well made”*
**Instructions/User Manual/Troubleshooting**5%
*“Instructions were good and clear”*
**Pressure**4%
*“Easy replacement for pressure assist toilets”*
### **What buyers complain about **
**Durability**17%
*“A very lightly used two months”*
**Functionality-Overall**14%
*“It did not solve my problem”*
**Leak-Proof**14%
*“Leaked”*
**Quality-Overall**10%
*“Poor quality part”*
**Value For Money**5%
*“Costs a bit more”*
**Maintenance And Repair**4%
*“needs frequent replacement”*
**Defective Material/Parts**4%
*“DEFECTIVE PART”*
**Assembly/Installation**4%
*“I double-checked the installation”*
**Size-Overall**3%
*“BAD FITTING CARTRIDGE”*
**Adhesion/Stickiness**2%
*“Now it sticks”*
### **Top return reasons **
**Size-Overall**20%
**Functionality-Overall**20%
**Defective Material/Parts**18%
**Leak-Proof**12%
**Compatibility-Overall**8%
**Assembly/Installation**4%
**Product Condition**2%
**Water Resistance**2%
**Value For Money**2%
**Maintenance And Repair**2%
## **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.
## **Related niches in Tools & Home Improvement**
- 73 [**solar outdoor lights**](https://flapen.com/research/us/tools-home-improvement/solar-outdoor-lights)$30.2M/yr+39.8%**Launch it**- 73 [**shower lamp**](https://flapen.com/research/us/tools-home-improvement/shower-lamp)$2.8M/yr+30.2%**Launch it**- 73 [**solar flowers**](https://flapen.com/research/us/tools-home-improvement/solar-flowers)$607K/yr+52.0%**Worth a look**- 73 [**american flag lights**](https://flapen.com/research/us/tools-home-improvement/american-flag-lights)$465K/yr+736.5%**Worth a look**- 73 [**solar fairy lights**](https://flapen.com/research/us/tools-home-improvement/solar-fairy-lights)$3.5M/yr+64.6%**Launch it**- 73 [**solar watering can with cascading lights**](https://flapen.com/research/us/tools-home-improvement/solar-watering-can-with-cascading-lights)$304K/yr+124.3%**Worth a look**[**All Tools & Home Improvement niches **](https://flapen.com/research/us/tools-home-improvement)