---
title: "Wd21x10519 — $58K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/appliances/wd21x10519"
last_updated: "2026-08-09T08:41:20.133Z"
locale: en
meta:
description: "Niche score 33/100 · $58K/yr market · 16K searches/yr · $17.02 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 33/100 · $58K/yr market · 16K searches/yr · $17.02 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Wd21x10519 — $58K/yr Amazon US Niche (2026) - Flapen"
---
# **wd21x10519**
**Skip it**
A concentrated shelf (top 5 take 96% of clicks) — this niche doesn't clear our bar today.
Market size 15Growth 19Conversion 100Competition 3Returns 30Price range 76Avg price 80Brand share 9Review moat 73Quality gap 17
**Conversion**
**Incredible****21.2%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$17.02**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$9.78–$31.79**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****562.83**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Okay****4.6%**
return rate — above 5% kills the launch gate
**Growth**
**Bad****-11.7%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$58K**
$58K/yr · 16K searches
**Brand share**
**Bad****96%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****96%**
top-5 click share — a locked-up shelf
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United States niche tracking, wd21x10519 is a $58K/yr Amazon United States market (16K searches/yr). The top 5 brands hold 96% of demand. Verdict: Skip it — 33/100.
Data updated Jul 5, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **wd21x10519 market data**
- **Units sold / yr**
- **3K–4K**
- avg 500–750/product
- **Revenue / yr**
- **$51K–$68K**
- units × avg price
- **Conversion rate**
- **21.2%**
- **Avg BSR**
- **#2,866**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **67%**
- **Out of stock**
- **25.3%**
- **Avg brand age**
- **34 months**
- **Avg seller age**
- **200 days**
## **Competition & brand share**
The top 5 products capture 96% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**6 **—flat
**Sellers**
**14**
**Top-5 brand share**
**96%**
Top 20: 100%
**Top-5 click share**
**96%**
Top 20: 100%
**Open market**
**0%**
- NOVINO30% - Parzuozenney30% - GYOFFULL21% - TOVEN-RV8% - GE7% - KYEKYE4%
## **Demand & seasonality**
Weekly Amazon search volume, last 109 weeks — -11.7% search growth over the last 90 days.
450350Black Friday '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.6×
[**Open Trend **](https://flapen.com/research/us/appliances/wd21x10519/trend)
## **Top wd21x10519 search terms**
- **wd21x10519**7K/yr+1.4%25.5% conv. - **ge dishwasher flood switch**4K/yr-17.2%16.0% conv. - **wd21x10519 ge flood switch**3K/yr-38.1%34.5% conv. - **ge dishwasher float switch**2K/yr+8.0%10.1% conv. [**All search terms **](https://flapen.com/research/us/appliances/wd21x10519/search-terms)
## **Top wd21x10519 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%$6K20%$12K30%$17K40%$23K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 6 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**WD21X10519 GE Dishwasher Flood Switch Replacement for GDT GDF PDT Series**NOVINO**$15.47**4.8★237 rev](https://www.amazon.com/dp/B0C8MRRQ9K) [2**WD21X10519 Dishwasher Flood Switch for GE Dishwasher/Thermistor Assembly**Parzuozenney**$15.66**4.6★443 rev](https://www.amazon.com/dp/B0C7KJ8RSQ) [3**GYOFFULL WD21X10519 Dishwasher Flood Switch**GYOFFULL**$9.78**4.6★125 rev](https://www.amazon.com/dp/B0C7GLY3Q8) [4**Upgraded WD21X10519 Dishwasher Flood Switch and Thermistor Assembly**TOVEN-RV**$16.40**4.6★178 rev](https://www.amazon.com/dp/B0CT5MR8Y5) [5**GE WD21X10519 Dishwasher Flood Switch and Thermistor Assembly**GE**$31.79**4.8★2,389 rev](https://www.amazon.com/dp/B018A3EIFG)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**WD21X10519 Dishwasher Flood Switch for GE Dishwasher/Thermistor Assembly**KYEKYE**$13.01**5 rev1y ago](https://www.amazon.com/dp/B0DTJ45D7Y) [**Upgraded WD21X10519 Dishwasher Flood Switch and Thermistor Assembly**TOVEN-RV**$16.40**178 rev2y ago](https://www.amazon.com/dp/B0CT5MR8Y5) [**WD21X10519 GE Dishwasher Flood Switch Replacement for GDT GDF PDT Series**NOVINO**$15.47**237 rev3y ago](https://www.amazon.com/dp/B0C8MRRQ9K) [**WD21X10519 Dishwasher Flood Switch for GE Dishwasher/Thermistor Assembly**Parzuozenney**$15.66**443 rev3y ago](https://www.amazon.com/dp/B0C7KJ8RSQ) [**GYOFFULL WD21X10519 Dishwasher Flood Switch**GYOFFULL**$9.78**125 rev3y ago](https://www.amazon.com/dp/B0C7GLY3Q8)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**GE WD21X10519 Dishwasher Flood Switch and Thermistor Assembly**GE**$31.79**4.8★**▲ 220%**](https://www.amazon.com/dp/B018A3EIFG) [**WD21X10519 Dishwasher Flood Switch for GE Dishwasher/Thermistor Assembly**KYEKYE**$13.01**5.0★**▲ 217%**](https://www.amazon.com/dp/B0DTJ45D7Y) [**GYOFFULL WD21X10519 Dishwasher Flood Switch**GYOFFULL**$9.78**4.6★**— 1%**](https://www.amazon.com/dp/B0C7GLY3Q8) [**WD21X10519 GE Dishwasher Flood Switch Replacement for GDT GDF PDT Series**NOVINO**$15.47**4.8★**— 2%**](https://www.amazon.com/dp/B0C8MRRQ9K) [**WD21X10519 Dishwasher Flood Switch for GE Dishwasher/Thermistor Assembly**Parzuozenney**$15.66**4.6★**— 2%**](https://www.amazon.com/dp/B0C7KJ8RSQ)
**~~View all trending →~~**
## **What buyers say about wd21x10519**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**21%
*“It fits”*
**Value For Money**15%
*“Great price”*
**Advertised Vs Actual Product**13%
*“Worked as advertised”*
**Heating**13%
*“now the dry heater works”*
**Ease Of Use**12%
*“it's pretty easy”*
**Maintenance And Repair**6%
*“Quick and easy fix”*
**Quality-Overall**5%
*“Very well made compared to the OEM”*
**Leak-Proof**3%
*“No leakage”*
**Functionality-Overall**3%
*“Did the job”*
**Assembly/Installation**1%
*“It was easy to install”*
### **What buyers complain about **
**Heating**32%
*“Not the heating element”*
**Ease Of Cleaning**12%
*“It was a little time consuming only because I wanted to clean all the parts before putting them back in”*
**Durability**11%
*“Broke and flooded our kitchen after just two years”*
**Quality-Overall**7%
*“they have little to no quality control”*
**Size-Overall**7%
*“The connector would not fit prior to this modification”*
**Water Resistance**5%
*“and the dishwasher would no longer boost water temperature”*
**Value For Money**4%
*“I was about to spend $600 on a new dishwasher”*
**Jamming/Clogging**1%
*“The old one was clearly clogged and when you shook it the insides didn't make a noise and nothing moved”*
**Maintenance And Repair**1%
*“Made the mistake of calling out a repair company that essentially told us the reason the water wasn't getting hot”*
### **Top return reasons **
**Defective Material/Parts**29%
**Size-Overall**21%
**Functionality-Overall**18%
**Compatibility-Overall**16%
**Advertised Vs Actual Product**5%
**Product Condition**2%
**Durability**2%
**Maintenance And Repair**1%
**Connectivity-Overall**1%
**Leak-Proof**1%
## **Common questions**
- **Is wd21x10519 profitable to sell on Amazon United States?**
- The niche generates $58K/yr across 6 tracked products. 90-day search growth is -11.7%. Flapen's verdict: Skip it (33/100).
- **How competitive is the wd21x10519 niche?**
- 6 brands and 14 sellers compete. The top 5 products take 96% of clicks and top 5 brands hold 96% of demand.
- **What do buyers complain about in wd21x10519?**
- Top complaints mined from reviews: Heating, Ease Of Cleaning, Durability. The return rate is 4.6%.
- **When does demand for wd21x10519 peak?**
- Demand is steady year-round — the busiest month runs 1.6× the quietest.
- **What does it cost to enter the wd21x10519 niche?**
- Listings span $9.78–$31.79; the average listing price is $17.02 (sweet spot $15–$100). The average incumbent carries 563 reviews — the moat a new listing must climb.
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