---
title: "Thetford 31705 — $9K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/thetford-31705"
last_updated: "2026-08-09T20:05:32.193Z"
locale: en
meta:
description: "Niche score 46/100 · $9K/yr market · 3K searches/yr · $19.65 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 46/100 · $9K/yr market · 3K searches/yr · $19.65 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Thetford 31705 — $9K/yr Amazon US Niche (2026) - Flapen"
---
# **thetford 31705**
**Skip it**
A concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.
Market size 2Growth 81Conversion 98Competition 0Returns 90Price range 93Avg price 87Brand share 0Review moat 62Quality gap 25
**Conversion**
**Incredible****16.5%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Great****$14.60–$31.52**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Great****1.3%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$19.65**
avg listing price — sweet spot $15–$100
**Growth**
**Great****+75.3%**
90-day search growth — must beat 0% to launch
**Review moat**
**Good****1,038.25**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$9K**
$9K/yr · 3K searches
**Competition**
**Bad****100%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, thetford 31705 is a $9K/yr Amazon United States market (3K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Apr–May–Jun–Jul. Verdict: Skip it — 46/100.
Data updated Jul 11, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **thetford 31705 market data**
- **Units sold / yr**
- **500–750**
- avg 100–250/product
- **Revenue / yr**
- **$10K–$15K**
- units × avg price
- **Conversion rate**
- **16.5%**
- **Avg BSR**
- **#42**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **75%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **48 months**
- **Avg seller age**
- **201 days**
## **Competition & brand share**
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**3 **▼falling
**Sellers**
**39**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**100%**
Top 20: 100%
**Open market**
**0%**
- Thetford54% - Vypart39% - Beech Lane6%
## **Demand & seasonality**
Weekly Amazon search volume, last 101 weeks — +75.3% search growth over the last 90 days.
10060Spike '24Black Friday '24Spike '25Black Friday '25Holiday '25Spike '26 seasonDecMarJunAugNovMarMay
Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 3.2×
[**Open Trend **](https://flapen.com/research/us/automotive/thetford-31705/trend)
## **Top thetford 31705 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%15%$1K30%$3K45%$4K60%$5K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 4 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Thetford 31705 Aqua-Magic V Toilet Water Module Assembly**Thetford**$31.52**4.7★2,324 rev](https://www.amazon.com/dp/B002UC1AYQ) [2**31705 31688 31687 31653 RV Toilet Water Valve kit- Freeze Resistance & Leakage-Resistant RV Toilet Parts for Thetford Aqua-Magic V High and Low by Vypart**Vypart**$14.60**4.6★714 rev](https://www.amazon.com/dp/B0D6RCMZTG) [3**Vypart 31705 RV Toilet Water Valve Kit - Fits Thetford Aqua-Magic V (High/Low Hand/Foot Flush) | Leak-Proof Freeze-Resistant Replaces 31688 31687 31653**Vypart**$16.08**4.5★58 rev](https://www.amazon.com/dp/B0FJ1WDR4T) [4**Beech Lane 31705 Toilet Water Module Assembly for Thetford Magic V Toilets Patented Leak Resistant Design Improved Valve Lifespan Designed In USA For High Performance (Natural)**Beech Lane**$16.41**4.6★1,057 rev](https://www.amazon.com/dp/B09NKB4TQF)
### **Newest**
by launch date
[**Vypart 31705 RV Toilet Water Valve Kit - Fits Thetford Aqua-Magic V (High/Low Hand/Foot Flush) | Leak-Proof Freeze-Resistant Replaces 31688 31687 31653**Vypart**$16.08**58 rev11mo ago](https://www.amazon.com/dp/B0FJ1WDR4T) [**31705 31688 31687 31653 RV Toilet Water Valve kit- Freeze Resistance & Leakage-Resistant RV Toilet Parts for Thetford Aqua-Magic V High and Low by Vypart**Vypart**$14.60**714 rev2y ago](https://www.amazon.com/dp/B0D6RCMZTG) [**Beech Lane 31705 Toilet Water Module Assembly for Thetford Magic V Toilets Patented Leak Resistant Design Improved Valve Lifespan Designed In USA For High Performance (Natural)**Beech Lane**$16.41**1,057 rev8y ago](https://www.amazon.com/dp/B09NKB4TQF) [**Thetford 31705 Aqua-Magic V Toilet Water Module Assembly**Thetford**$31.52**2,324 rev16y ago](https://www.amazon.com/dp/B002UC1AYQ)
### **Trending**
90-day click momentum
[**Thetford 31705 Aqua-Magic V Toilet Water Module Assembly**Thetford**$31.52**4.7★**▲ 34%**](https://www.amazon.com/dp/B002UC1AYQ) [**Vypart 31705 RV Toilet Water Valve Kit - Fits Thetford Aqua-Magic V (High/Low Hand/Foot Flush) | Leak-Proof Freeze-Resistant Replaces 31688 31687 31653**Vypart**$16.08**4.5★**— 5%**](https://www.amazon.com/dp/B0FJ1WDR4T) [**Beech Lane 31705 Toilet Water Module Assembly for Thetford Magic V Toilets Patented Leak Resistant Design Improved Valve Lifespan Designed In USA For High Performance (Natural)**Beech Lane**$16.41**4.6★**▼ 12%**](https://www.amazon.com/dp/B09NKB4TQF) [**31705 31688 31687 31653 RV Toilet Water Valve kit- Freeze Resistance & Leakage-Resistant RV Toilet Parts for Thetford Aqua-Magic V High and Low by Vypart**Vypart**$14.60**4.6★**▼ 29%**](https://www.amazon.com/dp/B0D6RCMZTG)
## **What buyers say about thetford 31705**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**29%
*“Excellent fit”*
**Quality-Overall**13%
*“Overall, this is a reliable replacement part that did exactly what it was supposed to do”*
**Value For Money**11%
*“The whole unit is affordable”*
**Leak-Proof**11%
*“Easy install and fixed the existing leak”*
**Assembly/Installation**10%
*“It came with everything needed for installation”*
**Efficiency**7%
*“functions as it should”*
**Ease Of Use**6%
*“Easy to replace”*
**Maintenance And Repair**3%
*“Very affordable fix”*
**Advertised Vs Actual Product**2%
*“As advertised”*
**Product Condition**1%
*“This in combination with a return lever spring makes it all feel brand new”*
### **What buyers complain about **
**Leak-Proof**31%
*“Leaking”*
**Quality-Overall**11%
*“so this raises concerns about durability or quality control”*
**Rusts/Corrodes**8%
*“Froze and cracked despite RV antifreeze”*
**Durability**8%
*“like all of the other brands of the same apparatus it will start failing in about a year”*
**Size-Overall**6%
*“it was a bit too loose”*
**Instructions/User Manual/Troubleshooting**4%
*“There are no instructions so if you dont know what you are doing you may have some issues”*
**Thickness**4%
*“rubber gasket is way too thick”*
**Design-Overall**3%
*“Poor design by Thetford to begin with”*
**Value For Money**3%
*“is a $2 valve too much to expect”*
### **Top return reasons **
**Size-Overall**29%
**Leak-Proof**20%
**Compatibility-Overall**18%
**Defective Material/Parts**12%
**Advertised Vs Actual Product**6%
**Functionality-Overall**5%
**Assembly/Installation**3%
**Value For Money**2%
**Connectivity-Overall**2%
**Maintenance And Repair**1%
## **Common questions**
- **Is thetford 31705 profitable to sell on Amazon United States?**
- The niche generates $9K/yr across 4 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +75.3%. Flapen's verdict: Skip it (46/100).
- **How competitive is the thetford 31705 niche?**
- 3 brands and 39 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in thetford 31705?**
- Top complaints mined from reviews: Leak-Proof, Quality-Overall, Rusts/Corrodes. The return rate is 1.3%.
- **When does demand for thetford 31705 peak?**
- Demand peaks in Apr–May–Jun–Jul; the busiest month runs 3.2× the quietest.
- **What does it cost to enter the thetford 31705 niche?**
- Listings span $14.60–$31.52; the average listing price is $19.65 (sweet spot $15–$100). The average incumbent carries 1,038 reviews — the moat a new listing must climb.
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