---
title: "Wv8840b1158 — $137K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/wv8840b1158"
last_updated: "2026-08-08T13:40:40.118Z"
locale: en
meta:
description: "Niche score 40/100 · $137K/yr market · 23K searches/yr · $104.01 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 40/100 · $137K/yr market · 23K searches/yr · $104.01 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Wv8840b1158 — $137K/yr Amazon US Niche (2026) - Flapen"
---
# **wv8840b1158**
**Skip it**
High returns (9.0%) — this niche doesn't clear our bar today.
Market size 30Growth 15Conversion 65Competition 31Returns 11Price range 39Avg price 74Brand share 42Review moat 29Quality gap 96
**Quality gap**
**Incredible****3.9★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Good****$104.01**
avg listing price — sweet spot $15–$100
**Conversion**
**Good****5.8%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Okay****80%**
top-5 brand share — brands hold most of the demand
**Price range**
**Okay****$21.41–$221.46**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Okay****66%**
top-5 click share — leaders hold, buyers still browse
**Market size**
**Okay****$137K**
$137K/yr · 23K searches
**Review moat**
**Okay****3,558.71**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-19.7%**
90-day search growth — must beat 0% to launch
**Returns**
**Bad****9.0%**
return rate — above 5% kills the launch gate
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500") [** Quality Gap**](https://flapen.com/research/niches?market=us&signal=quality_gap "Avg rating < 4.0") [** 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") [** Out of Stock**](https://flapen.com/research/niches?market=us&signal=out_of_stock "OOS rate > 10%")
According to Flapen's Amazon United States niche tracking, wv8840b1158 is a $137K/yr Amazon United States market (23K searches/yr). The top 5 brands hold 80% of demand. Demand peaks in Jan–Nov. Verdict: Skip it — 40/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **wv8840b1158 market data**
- **Units sold / yr**
- **750–1K**
- avg 0–100/product
- **Revenue / yr**
- **$78K–$104K**
- units × avg price
- **Conversion rate**
- **5.8%**
- **Avg BSR**
- **#15,147**
- **Page quality**
- **0%**
- **Prime**
- **35%**
- **Sponsored**
- **53%**
- **Out of stock**
- **9.1%**
- **Avg brand age**
- **50 months**
- **Avg seller age**
- **157 days**
## **Competition & brand share**
The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**11 **▲rising
**Sellers**
**91**
**Top-5 brand share**
**80%**
Top 20: 100%
**Top-5 click share**
**66%**
Top 20: 100%
**Open market**
**14%**
- ClimaTek38% - XFParts14% - Generic12% - Honeywell9% - Bali7% - Advice Appliance Parts6% - Open — no brand owns it (5 brands, 14%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -19.7% search growth over the last 90 days.
600400Spike '24Black Friday '24Spike '25Prime Day '25Black Friday '25 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Nov · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/wv8840b1158/trend)
## **Top wv8840b1158 search terms**
- **wv8840b1158**14K/yr-26.0%3.4% conv. - **wv8840b1158 gas valve**4K/yr+35.1%5.5% conv. - **honeywell wv8840b1158**4K/yr-42.8%3.1% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/wv8840b1158/search-terms)
## **Top wv8840b1158 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%$14K20%$27K30%$41K40%$55K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)3 products missing review or click data not plotted
All 17 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**WV8840B1158 - OEM Upgraded Water Heater NG Gas Valve Replaces Honeywell - 2 Cavity**ClimaTek**$221.11**4.4★126 rev](https://www.amazon.com/dp/B0CVHDMCLM) [2**Replacement for Honeywell Water Heater Gas Valve WV8840B1158 OEM**XFParts**$87.74**2.9★4 rev](https://www.amazon.com/dp/B0FVSVW3HN) [3**Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1 Cavity made by Resideo**Honeywell**$156.41**4.4★1,777 rev](https://www.amazon.com/dp/B06XNSV2BG) [4**Advice Appliance Parts Water Heater Gas Valve Control Board WV8840B1141 WV8840B1110 WV8840B1158 100262939**Advice Appliance Parts**$67.24**4.4★68 rev](https://www.amazon.com/dp/B0BSDY25WM) [5**WV8840B1158 - OEM Upgraded Water Heater NG Gas Valve Replaces A.O. Smith**ClimaTek**$221.46**4.6★7 rev](https://www.amazon.com/dp/B0CVHBWR8Y)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**fjptjz Water Heater Valve Control WV8840B1158 Major Appliances Replacement Parts**fjptjz**$82.95**1 rev2mo ago](https://www.amazon.com/dp/B0H392GY6B) [**Replacement for Honeywell Water Heater Gas Valve WV8840B1158 OEM**GENERIC**$139.06**0 rev2mo ago](https://www.amazon.com/dp/B0H37KFB3R) [**Replacement for Honeywell Water Heater Gas Valve WV8840B1158 OEM**Generic**$125.48**0 rev2mo ago](https://www.amazon.com/dp/B0H2PCHH6F) [**Bali Womens One Smooth U Ultra Light Illusion Neckline Underwire Bra Black 38C**Bali**$21.41**42,846 rev3mo ago](https://www.amazon.com/dp/B00JAC0S10) [**Replacement for Honeywell Water Heater Gas Valve WV8840B1158 OEM # Used**Generic**$152.02**0 rev3mo ago](https://www.amazon.com/dp/B0GXPF5WZM)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Bali womens One Smooth U Smoothing & Concealing Underwire Df3w11 bras White 38C US**Bali**$21.77**4.2★**▲ 291%**](https://www.amazon.com/dp/B013G76N04) [**Replacement for Honeywell Water Heater Gas Valve WV8840B1158 OEM # Used**Generic**$152.02**0.0★**▲ 289%**](https://www.amazon.com/dp/B0GXPF5WZM) [**fjptjz Water Heater Valve Control WV8840B1158 Major Appliances Replacement Parts**fjptjz**$82.95**1.0★**▲ 289%**](https://www.amazon.com/dp/B0H392GY6B) [**Replacement for Honeywell Water Heater Gas Valve WV8840B1158 OEM**Generic**$125.48**0.0★**▲ 288%**](https://www.amazon.com/dp/B0H2PCHH6F) [**Underoutfit Perfect Neckline Everyday Wireless Bra - Comfy Womens Without Underwire**Underoutfit**$56.14**4.1★**▲ 288%**](https://www.amazon.com/dp/B0D9GWJNF9)
**~~View all trending →~~**
## **What buyers say about wv8840b1158**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Advertised Vs Actual Product**23%
*“Exactly as advertised”*
**Value For Money**20%
*“Great price for your water tank cheaper than the hardware”*
**Comfort-Overall**10%
*“This is one of the most comfortable bras I have ever had”*
**Quality-Overall**9%
*“Been over a year and no complaints”*
**Heating**9%
*“water heater is back up and working”*
**Size-Overall**6%
*“Perfect fit”*
**Assembly/Installation**6%
*“It was very easy to install”*
**Efficiency**4%
*“Worked perfect”*
**Maintenance And Repair**4%
*“Exactly fix”*
**Pressure**2%
*“Great gas valve”*
### **What buyers complain about **
**Quality-Overall**27%
*“Trash”*
**Defective Material/Parts**13%
*“Faulty item shipped in an envelope so electronic parts may have been damaged”*
**Heating**10%
*“Honeywell gas control shuts off on high heat often”*
**Pain Relief-Overall**7%
*“Hurt to wear”*
**Color**7%
*“just different color”*
**Functionality-Overall**7%
*“didn't work out”*
**Comfort-Overall**3%
*“The band is uncomfortable”*
**Product Condition**3%
*“But also shows this item is returned frequently”*
**Asymmetry**3%
*“The closure was quite a bit wider than the band and asymmetric”*
**Smell**3%
*“Now, for the first time in many years I have no gas smell at all for the past 30 days”*
### **Top return reasons **
**Size-Overall**49%
**Chest Fit**13%
**Functionality-Overall**5%
**Compatibility-Overall**5%
**Defective Material/Parts**5%
**Advertised Vs Actual Product**5%
**Product Condition**2%
**Comfort-Overall**2%
**Heating**1%
**Maintenance And Repair**1%
## **Common questions**
- **Is wv8840b1158 profitable to sell on Amazon United States?**
- The niche generates $137K/yr across 17 tracked products. 2 of 8 products launched in the last 360 days are still selling. 90-day search growth is -19.7%. Flapen's verdict: Skip it (40/100).
- **How competitive is the wv8840b1158 niche?**
- 11 brands and 91 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 80% of demand.
- **What do buyers complain about in wv8840b1158?**
- Top complaints mined from reviews: Quality-Overall, Defective Material/Parts, Heating. The return rate is 9.0% — above our launch gate.
- **When does demand for wv8840b1158 peak?**
- Demand peaks in Jan–Nov; the busiest month runs 1.7× the quietest.
- **What does it cost to enter the wv8840b1158 niche?**
- Listings span $21.41–$221.46; the average listing price is $104.01 (sweet spot $15–$100). The average incumbent carries 3,559 reviews — the moat a new listing must climb.
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