---
title: "Def Pump — $397K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/def-pump"
last_updated: "2026-08-09T17:41:13.115Z"
locale: en
meta:
description: "Niche score 54/100 · $397K/yr market. Prices mostly outside the sweet spot ($30.53–$1401.02) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · $397K/yr market. Prices mostly outside the sweet spot ($30.53–$1401.02) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Def Pump — $397K/yr Amazon US Niche (2026) - Flapen"
---
# **def pump**
**Worth a look**
Shows a thin review moat (23 avg reviews), but prices mostly outside the sweet spot ($30.53–$1401.02) keeps it on the watch list.
Market size 55Growth 22Conversion 50Competition 70Returns 52Price range 5Avg price 40Brand share 79Review moat 99Quality gap 63
**Review moat**
**Incredible****23.3**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Great****56%**
top-5 brand share — no brand owns this niche
**Competition**
**Good****43%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Market size**
**Good****$397K**
$397K/yr · 41K searches
**Returns**
**Good****2.9%**
return rate — above 5% kills the launch gate
**Conversion**
**Good****4.0%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Okay****$240.31**
avg listing price — sweet spot $15–$100
**Growth**
**Bad****-5.8%**
90-day search growth — must beat 0% to launch
**Price range**
**Bad****$30.53–$1401.02**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500") [** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
According to Flapen's Amazon United States niche tracking, def pump is a $397K/yr Amazon United States market (41K searches/yr). The top 5 brands hold 56% of demand. Verdict: Worth a look — 54/100.
Data updated Jul 11, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **def pump market data**
- **Units sold / yr**
- **2K–2K**
- avg 0–100/product
- **Revenue / yr**
- **$360K–$481K**
- units × avg price
- **Conversion rate**
- **4.0%**
- **Avg BSR**
- **#222**
- **Page quality**
- **0%**
- **Prime**
- **93%**
- **Sponsored**
- **95%**
- **Out of stock**
- **4.6%**
- **Avg brand age**
- **37 months**
- **Avg seller age**
- **183 days**
## **Competition & brand share**
The top 5 products take 43% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**27 **▲rising
**Sellers**
**59**
**Top-5 brand share**
**56%**
Top 20: 94%
**Top-5 click share**
**43%**
Top 20: 79%
**Open market**
**41%**
- YGHGAUH31% - Pumpoasis9% - Fill-Rite7% - TERA PUMP5% - Lonsge4% - Orvexa4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -5.8% search growth over the last 90 days.
1K600Spike '25Prime Day '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/us/automotive/def-pump/trend)
## **Top def pump search terms**
- **def pump**23K/yr+0.6%3.5% conv. - **def pump 55 gallon drum**6K/yr-4.2%8.1% conv. - **def transfer pump**5K/yr-22.1%1.7% conv. - **def pump for tote**3K/yr+9.1%4.3% conv. - **def fluid pump**3K/yr-33.0%4.4% conv. [**All search terms **](https://flapen.com/research/us/automotive/def-pump/search-terms)
## **Top def pump 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%4%$16K8%$32K12%$48K16%$64K1101001K 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**Electric Drum Barrel Pump with 120V AC/12V DC Power 55 Gallon Drum Pump with Built-in 2-Inch Bung Adapter 5 Gallons Per Minute Flow Rate for DEF Diesel Water Antifreeze**YGHGAUH**$210.77**4.1★28 rev](https://www.amazon.com/dp/B0DLG1CX71) [2**AC 110V-120V Diesel Exhaust Fluid Transfer Pump Self-Priming Electric Diaphragm DEF Pump for Urea Oil Water & Irrigation.Diaphragm Pumps with 400W 10.6 GPM 36ft LiftWhite**YGHGAUH**$147.17**4.3★10 rev](https://www.amazon.com/dp/B0DRCQYJ2S) [3**AC 110V-120V DEF Transfer Pump Kit. 400W 10.6 GPM (40 LPM) 23 PSI DEF Pump Kit Compatible with U.S. Plug. Includes Urea Gun K24 Flowmeter & AccessoriesWhite**YGHGAUH**$371.95**5.0★5 rev](https://www.amazon.com/dp/B0DRCNSNXM) [4**Fill-Rite FRHP32V Hand Operated Diesel Exhaust Fluid (DEF) Transfer Pump**Fill-Rite**$116.13**4.3★55 rev](https://www.amazon.com/dp/B007YV1RY6) [5**TERA PUMP Electric Powered 55 Gallon Drum Barrel Pump 2.4GPM**TERA PUMP**$194.64**3.8★28 rev](https://www.amazon.com/dp/B0DPPFQTS7)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Orvexa AC 110V-120V DEF Transfer Pump Kit with US Plug High-Flow Self-Priming DEF Pump for Diesel Exhaust Fluid Transfer Compatible with Drums Totes and Wall Mounting Includes Premium Accessories**Orvexa**$339.94**1 rev5mo ago](https://www.amazon.com/dp/B0GGHJV1YJ) [**110-120V DEF Transfer Pump Self-Priming Electric Diaphragm Drum Pump for Diesel Exhaust Fluid Urea Oil & Water 10.6 GPM High Flow 400W Motor 36 ft Lift US Plug**Orvexa**$130.56**2 rev6mo ago](https://www.amazon.com/dp/B0GG9ZGJ1J) [**KONA TOOLS DEF Narrow Outlet Battery-Powered Pump (3.2 GPM)**KONA TOOLS**$36.05**23 rev6mo ago](https://www.amazon.com/dp/B0GFGLLCS7) [**PAMBER Electric Drum Pump with 120V AC/12V DC Power 33.5-49 Telescopic Suction Tube Drum Barrel Pump with Swivel Nut Nozzle 5 Gallons/mins Max Flow Rate for DEF Diesel Water etc.**PAMBER**$193.75**14 rev9mo ago](https://www.amazon.com/dp/B0FNRDNZNL) [**Electric Drum Pump with120V AC/12V DC Power 55 Gallon Drum Pump Electric Built-in 2-Inch Bung Adapter 5 GPM Flow Rate Telescoping Suction Tube 34 to 49 Suitable for Diesel DEF Water Antifreeze**YSVORTOT**$186.14**6 rev9mo ago](https://www.amazon.com/dp/B0FNQJZ84Q)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Orvexa AC 110V-120V DEF Transfer Pump Kit with US Plug High-Flow Self-Priming DEF Pump for Diesel Exhaust Fluid Transfer Compatible with Drums Totes and Wall Mounting Includes Premium Accessories**Orvexa**$339.94**5.0★**▲ 266%**](https://www.amazon.com/dp/B0GGHJV1YJ) [**KONA TOOLS DEF Narrow Outlet Battery-Powered Pump (3.2 GPM)**KONA TOOLS**$36.05**4.3★**▲ 259%**](https://www.amazon.com/dp/B0GFGLLCS7) [**110-120V DEF Transfer Pump Self-Priming Electric Diaphragm Drum Pump for Diesel Exhaust Fluid Urea Oil & Water 10.6 GPM High Flow 400W Motor 36 ft Lift US Plug**Orvexa**$130.56**5.0★**▲ 207%**](https://www.amazon.com/dp/B0GG9ZGJ1J) [**Electric Drum Barrel Pump 110V-240V AC/ 12V DC Power 55 Gallon Electric Transfer Pumps with 2-Inch Bung Adapter 5 GPM Flow Rate Suitable for DEF Diesel Water Antifreeze**Uotnam**$178.21**4.9★**▲ 128%**](https://www.amazon.com/dp/B0FN7335WH) [**Upgraded AC 110V-120V DEF Transfer Pump Kit High-Flow Self-Priming DEF Pump with US Plug Compatible with Drums/Totes/Wall Mounts Corrosion-Resistant Includes All Premium Accessories**Feraiti**$333.06**5.0★**▲ 109%**](https://www.amazon.com/dp/B0FKGNHLD9)
**~~View all trending →~~**
## **What buyers say about def pump**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**11%
*“the hose feels like good quality”*
**Efficiency**11%
*“This fuel pump works great”*
**Ease Of Use**10%
*“Make life easy”*
**Value For Money**7%
*“Good price”*
**Advertised Vs Actual Product**6%
*“Works as should”*
**Assembly/Installation**6%
*“Easy assembly”*
**Size-Overall**5%
*“Direct fit”*
**Durability**4%
*“Durable and works well”*
**Pressure**4%
*“A pump makes it a lot easier”*
**Battery Life**3%
*“battery pack as the power method”*
### **What buyers complain about **
**Durability**19%
*“Broke quickly”*
**Functionality-Overall**10%
*“it wont pump at all”*
**Quality-Overall**8%
*“Only downside is it feels a little cheap”*
**Size-Overall**6%
*“Larger orings”*
**Leak-Proof**5%
*“May leak due to smaller line connection than original”*
**Value For Money**4%
*“The price is a bit high, at $165,”*
**Strength**3%
*“Brittle plastic, breaks easily”*
**Spray/Flow**3%
*“nozzle stopped working”*
**Noise Level**3%
*“Went through the hassle of changing the pump and it lasted maybe 5 minutes, starting making wacky noises, then quit”*
**Smell**3%
*“It smells like carpet cleaner”*
### **Top return reasons **
**Functionality-Overall**16%
**Defective Material/Parts**16%
**Size-Overall**13%
**Advertised Vs Actual Product**7%
**Quality-Overall**4%
**Durability**4%
**Compatibility-Overall**4%
**Leak-Proof**3%
**Assembly/Installation**3%
**Value For Money**3%
## **Common questions**
- **Is def pump profitable to sell on Amazon United States?**
- The niche generates $397K/yr across 40 tracked products. 7 of 14 products launched in the last 360 days are still selling. 90-day search growth is -5.8%. Flapen's verdict: Worth a look (54/100).
- **How competitive is the def pump niche?**
- 27 brands and 59 sellers compete. The top 5 products take 43% of clicks and top 5 brands hold 56% of demand.
- **What do buyers complain about in def pump?**
- Top complaints mined from reviews: Durability, Functionality-Overall, Quality-Overall. The return rate is 2.9%.
- **When does demand for def pump peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the def pump niche?**
- Listings span $30.53–$1401.02; the average listing price is $240.31 (sweet spot $15–$100). The average incumbent carries 23 reviews — the moat a new listing must climb.
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