---
title: "Kohler Shower Cartridge — $809K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/kohler-shower-cartridge"
last_updated: "2026-08-09T04:35:34.381Z"
locale: en
meta:
description: "Niche score 50/100 · $809K/yr market. Brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 50/100 · $809K/yr market. Brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Kohler Shower Cartridge — $809K/yr Amazon US Niche (2026) - Flapen"
---
# **kohler shower cartridge**
**Worth a look**
Shows a thin review moat (248 avg reviews), but brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list.
Market size 73Growth 22Conversion 49Competition 76Returns 20Price range 13Avg price 81Brand share 6Review moat 88Quality gap 82
**Review moat**
**Great****247.58**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Great****4.2★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Great****$82.84**
avg listing price — sweet spot $15–$100
**Competition**
**Great****39%**
top-5 click share — an open shelf
**Market size**
**Good****$809K**
$809K/yr · 252K searches
**Conversion**
**Okay****3.9%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Bad****-6.5%**
90-day search growth — must beat 0% to launch
**Returns**
**Bad****6.3%**
return rate — above 5% kills the launch gate
**Price range**
**Bad****$20.25–$646.64**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Bad****98%**
top-5 brand share — brand-locked demand
**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%") [** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
According to Flapen's Amazon United States niche tracking, kohler shower cartridge is a $809K/yr Amazon United States market (252K searches/yr). The top 5 brands hold 98% of demand. Verdict: Worth a look — 50/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **kohler shower cartridge market data**
- **Units sold / yr**
- **10K–13K**
- avg 100–250/product
- **Revenue / yr**
- **$828K–$1.0M**
- units × avg price
- **Conversion rate**
- **3.9%**
- **Avg BSR**
- **#550**
- **Page quality**
- **0%**
- **Prime**
- **92%**
- **Sponsored**
- **63%**
- **Out of stock**
- **2.2%**
- **Avg brand age**
- **39 months**
- **Avg seller age**
- **137 days**
## **Competition & brand share**
Clicks spread well past the top 5 (39% combined) — an open shelf where new products get seen.
**Brands**
**8 **▲rising
**Sellers**
**145**
**Top-5 brand share**
**98%**
Top 20: 100%
**Top-5 click share**
**39%**
Top 20: 78%
**Open market**
**1%**
- Kohler75% - Tanxury13% - Vayolli4% - GREATUS3% - Edifla2% - ATESMO1% - Open — no brand owns it (2 brands, 1%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -6.5% search growth over the last 90 days.
5K3KSpike '24Spike '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.8×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/kohler-shower-cartridge/trend)
## **Top kohler shower cartridge search terms**
- **kohler shower valve**41K/yr-13.0%3.3% conv. - **kohler shower handle**40K/yr-12.0%2.2% conv. - **kohler shower trim kit**31K/yr+8.3%1.1% conv. - **kohler shower cartridge**26K/yr-13.0%6.5% conv. - **kohler shower faucet**19K/yr-23.2%0.6% conv. - **kohler shower valve and trim kit**11K/yr+6.8%1.0% conv. - **kohler shower cartridge replacement**10K/yr+34.9%7.8% conv. - **kohler shower trim**9K/yr-22.3%1.8% conv. - **kohler rite temp shower trim kit**5K/yr+18.1%2.9% conv. - **kohler k 304 trim kit**6K/yr-1.5%0.9% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/kohler-shower-cartridge/search-terms)
## **Top kohler shower 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%3%$24K6%$49K9%$73K12%$97K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**KOHLER Rite-Temp Pressure Balance Cartridge Genuine Part GP800881 One-Piece Design Simplifies Installation and Maintenance**Kohler**$45.70**4.5★630 rev](https://www.amazon.com/dp/B06XGLZTF7) [2**GP876851 Mixer Cap and Pressure Balancing Unit Kit Compatible with Kohler Shower Valves K-304 and K-11748 Platforms Shower Cartridge Replacement Repair Kit Include GP800820 and GP77759**Tanxury**$31.88**4.0★141 rev](https://www.amazon.com/dp/B0D8PMLMG1) [3**Kohler TS35320-4-CP Elate Rite-Temp Valve Trim Polished Chrome Shiny Bathroom Valve Easy Maintenance**Kohler**$44.61**4.3★54 rev](https://www.amazon.com/dp/B0F2NNBMD9) [4**KOHLER 8304-K-NA Rite-Temp Pressure-Balancing Valve Body and Cartridge Kit Shower Valve System 5.0 GPM Simple Installation & Maintenance**Kohler**$92.23**4.6★1,259 rev](https://www.amazon.com/dp/B06XGQ8P4V) [5**Kohler TS35320-4-BN Elate Rite-Temp Valve Trim Vibrant Brushed Nickel Elegant Bathroom Valve Rust-Resistant**Kohler**$71.78**4.3★54 rev](https://www.amazon.com/dp/B0F2NX7VG7)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**1307346 Mixer Cap Sp Kit and GP800820 Pressure Balancing Unit Cartridge Compatible with Kohler Shower Valve Shower Cartridge Repair Kit for Rite-Temp and K-304 Shower Valve Retro**Edifla**$67.86**7 rev8mo ago](https://www.amazon.com/dp/B0G2L8CHHN) [**Kohler TS35320-4-CP Elate Rite-Temp Valve Trim Polished Chrome Shiny Bathroom Valve Easy Maintenance**Kohler**$44.61**54 rev1y ago](https://www.amazon.com/dp/B0F2NNBMD9) [**Kohler TS35320-4-BN Elate Rite-Temp Valve Trim Vibrant Brushed Nickel Elegant Bathroom Valve Rust-Resistant**Kohler**$71.78**54 rev1y ago](https://www.amazon.com/dp/B0F2NX7VG7) [**Kohler TS35320-4-BL Elate Rite-Temp Valve Trim Matte Black Contemporary Bathroom Valve High Durability**Kohler**$71.11**54 rev1y ago](https://www.amazon.com/dp/B0F2PBBWNP) [**Kohler TS35320-4-2MB Elate Rite-Temp Valve Trim Vibrant Brushed Moderne Brass Premium Bathroom Valve Easy to Use**Kohler**$76.10**54 rev1y ago](https://www.amazon.com/dp/B0F2PB38KN)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Kohler TS35320-4-BN Elate Rite-Temp Valve Trim Vibrant Brushed Nickel Elegant Bathroom Valve Rust-Resistant**Kohler**$71.78**4.3★**▲ 134%**](https://www.amazon.com/dp/B0F2NX7VG7) [**Kohler TS35320-4-2MB Elate Rite-Temp Valve Trim Vibrant Brushed Moderne Brass Premium Bathroom Valve Easy to Use**Kohler**$76.10**4.3★**▲ 121%**](https://www.amazon.com/dp/B0F2PB38KN) [**KOHLER K-8304-KS-NA Rite-Temp Pressure-Balancing Valve Body and Cartridge Kit with Service Stops Shower Valve System 5.0 GPM Simple Installation & Maintenance**Kohler**$106.24**4.6★**▲ 78%**](https://www.amazon.com/dp/B06W9PDTPH) [**Kohler TS35320-4-BL Elate Rite-Temp Valve Trim Matte Black Contemporary Bathroom Valve High Durability**Kohler**$71.11**4.3★**▲ 49%**](https://www.amazon.com/dp/B0F2PBBWNP) [**1307346 Mixer Cap Sp Kit and GP800820 Pressure Balancing Unit Cartridge Compatible with Kohler Shower Valve Shower Cartridge Repair Kit for Rite-Temp and K-304 Shower Valve Retro**Edifla**$67.86**4.3★**▲ 46%**](https://www.amazon.com/dp/B0G2L8CHHN)
**~~View all trending →~~**
## **What buyers say about kohler shower cartridge**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**17%
*“Great fit”*
**Quality-Overall**16%
*“Great quality”*
**Assembly/Installation**16%
*“Ease of installation”*
**Advertised Vs Actual Product**8%
*“it works as expected”*
**Leak-Proof**6%
*“So far so good, leak-less install”*
**Value For Money**4%
*“Affordable”*
**Pressure**4%
*“Great pressure balancer and cartridge”*
**Ease Of Use**3%
*“Easy and quick”*
**Efficiency**3%
*“Works like it should”*
**Ease Of Cleaning**2%
*“easy to keep clean”*
### **What buyers complain about **
**Leak-Proof**23%
*“Bought 2 both leaked”*
**Durability**13%
*“Part broke within few months of use”*
**Size-Overall**9%
*“This fitting does not fit well and cracks”*
**Quality-Overall**8%
*“I believe this is a low quality cartridge”*
**Defective Material/Parts**5%
*“Missing parts”*
**Instructions/User Manual/Troubleshooting**4%
*“And not great instructions”*
**Water Resistance**4%
*“The water does not shut off at all”*
**Advertised Vs Actual Product**4%
*“Misleading listing”*
**Compatibility-Overall**3%
*“Note: Check Compatibility”*
**Value For Money**3%
*“It's more money”*
### **Top return reasons **
**Size-Overall**39%
**Compatibility-Overall**17%
**Defective Material/Parts**10%
**Leak-Proof**7%
**Advertised Vs Actual Product**7%
**Product Condition**4%
**Functionality-Overall**4%
**Value For Money**4%
**Assembly/Installation**2%
**Material Quality**2%
## **Common questions**
- **Is kohler shower cartridge profitable to sell on Amazon United States?**
- The niche generates $809K/yr across 48 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -6.5%. Flapen's verdict: Worth a look (50/100).
- **How competitive is the kohler shower cartridge niche?**
- 8 brands and 145 sellers compete. The top 5 products take 39% of clicks and top 5 brands hold 98% of demand.
- **What do buyers complain about in kohler shower cartridge?**
- Top complaints mined from reviews: Leak-Proof, Durability, Size-Overall. The return rate is 6.3% — above our launch gate.
- **When does demand for kohler shower cartridge peak?**
- Demand is steady year-round — the busiest month runs 1.8× the quietest.
- **What does it cost to enter the kohler shower cartridge niche?**
- Listings span $20.25–$646.64; the average listing price is $82.84 (sweet spot $15–$100). The average incumbent carries 248 reviews — the moat a new listing must climb.
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