---
title: "Bathtub Water Filter — $1.4M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/bathtub-water-filter"
last_updated: "2026-08-07T17:16:29.191Z"
locale: en
meta:
description: "Niche score 55/100 · $1.4M/yr market · 933K searches/yr · $35.31 avg price. Soft demand (-20.8% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 55/100 · $1.4M/yr market · 933K searches/yr · $35.31 avg price. Soft demand (-20.8% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Bathtub Water Filter — $1.4M/yr Amazon US Niche (2026) - Flapen"
---
# **bathtub water filter**
**Worth a look**
Shows a sweet-spot price point ($35.31 avg), but soft demand (-20.8% this quarter) keeps it on the watch list.
Market size 84Growth 15Conversion 52Competition 30Returns 83Price range 93Avg price 95Brand share 40Review moat 25Quality gap 80
**Avg price**
**Incredible****$35.31**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$12.95–$88.34**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Great****$1.4M**
$1.4M/yr · 933K searches
**Returns**
**Great****1.6%**
return rate — above 5% kills the launch gate
**Quality gap**
**Great****4.2★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Good****4.2%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Okay****81%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****67%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Bad****4,744.18**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-20.8%**
90-day search growth — must beat 0% to launch
**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, bathtub water filter is a $1.4M/yr Amazon United States market (933K searches/yr). The top 5 brands hold 81% of demand. Demand peaks in Jan–Feb–Mar. Verdict: Worth a look — 55/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **bathtub water filter market data**
- **Units sold / yr**
- **40K–50K**
- avg 1,500–2,000/product
- **Revenue / yr**
- **$1.4M–$1.8M**
- units × avg price
- **Conversion rate**
- **4.2%**
- **Avg BSR**
- **#73**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **15.1%**
- **Avg brand age**
- **37 months**
- **Avg seller age**
- **158 days**
## **Competition & brand share**
The top 5 products take 67% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**12 **▼falling
**Sellers**
**31**
**Top-5 brand share**
**81%**
Top 20: 100%
**Top-5 click share**
**67%**
Top 20: 100%
**Open market**
**15%**
- Canopy38% - Beati Faucet24% - Santevia8% - SHLLKTTRY7% - JUSTOWE5% - Crystal Quest4% - Open — no brand owns it (6 brands, 15%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -20.8% search growth over the last 90 days.
25K15KSpike '24Spike '25Prime Day '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, Mar · busiest ÷ quietest = 2.1×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/bathtub-water-filter/trend)
## **Top bathtub water filter search terms**
- **canopy bathtub filter**80K/yr-6.5%2.9% conv. - **bathtub filter**92K/yr-18.5%3.7% conv. - **bath filter for tub**104K/yr-29.5%4.4% conv. - **bath tub filter**79K/yr-23.2%3.2% conv. - **bath filter**80K/yr-18.5%4.0% conv. - **bathtub water filter**78K/yr-27.2%3.5% conv. - **bath water filter**76K/yr-27.8%4.1% conv. - **bathtub filter for tub faucet**47K/yr-36.7%3.5% conv. - **canopy water filter**26K/yr+18.8%2.2% conv. - **water filter for bathtub**35K/yr-31.0%3.3% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/bathtub-water-filter/search-terms)
## **Top bathtub water filter 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%$138K20%$276K30%$414K40%$552K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 17 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Canopy Baby Bath Tub Filter Gentler Water Filtration for Delicate Skin | Reduces Chlorine & Irritants | BPA-Free Silicone Spout Cover | Easy Tool-Free Install | Activated Carbon Filtration**Canopy**$84.90**4.1★137 rev](https://www.amazon.com/dp/B0FLN3N4T1) [2**Bath Bathtub Shower Water Filter for Tub Faucet - Hard Water Softener - Remove Contaminants Chlorine and Fluoride - Improves Skin Hair and Nails Condition White BTBF-051**Beati Faucet**$27.44**4.3★914 rev](https://www.amazon.com/dp/B0CXT5KL5Z) [3**Canopy Baby Bath Tub Filter Gentler Water Filtration for Delicate Skin | Reduces Chlorine & Irritants | BPA-Free Silicone Spout Cover | Easy Tool-Free Install | Activated Carbon Filtration**Canopy**$88.34**4.1★137 rev](https://www.amazon.com/dp/B0GFQ1JRSK) [4**Organic Cotton Bath Faucet Filter by Santevia | Sensitive Skin Bathtub Water Purifier | Adds Nourishing Minerals for Hair & Skin | Chlorine Filter | Made in North America**Santevia**$21.43**4.0★2,382 rev](https://www.amazon.com/dp/B0742KFY9R) [5**Beati Faucet Bath Filter for Tub - Kinder Water Filter for Bathtub Hard Water Softener to Remove Lead Chlorine and Fluoride Improve Skin Hair and Nails Condition Chrome**Beati Faucet**$25.21**4.3★914 rev](https://www.amazon.com/dp/B0D78Y1TX6)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**15-Stage Bath Water Filter for Tub Faucet Yvelines 7500 Gallons Bathtub Filter Softens Hard Water & Removes Chlorine for Healthier Skin & Hair BPA-Free (White)**YVELINES**$28.76**19 rev3mo ago](https://www.amazon.com/dp/B0GY4C5KRM) [**KOSNEW Bath Faucet Filter 10-Stage Advanced Shower Water Filter for Tub with 3 000 Gallon Non-Spill Filtration Removes Chlorine Fluoride Hardness for Baby-Safe Sensitive Skin Soft Bath Water**KOSNEW**$25.03**80 rev3mo ago](https://www.amazon.com/dp/B0GR4L8BVN) [**Canopy Baby Bath Tub Filter Gentler Water Filtration for Delicate Skin | Reduces Chlorine & Irritants | BPA-Free Silicone Spout Cover | Easy Tool-Free Install | Activated Carbon Filtration**Canopy**$88.34**137 rev6mo ago](https://www.amazon.com/dp/B0GFQ1JRSK) [**SHLLKTTRY Bath Water Filter for Tub Faucet with Overflow Filtration Remove Contaminants Chlorine Fluoride Hard Water Softener Enhances Health of Skin Hair Nails Relieve Eczema 3 000 Gallons White**SHLLKTTRY**$27.57**206 rev7mo ago](https://www.amazon.com/dp/B0D3ZYMYCP) [**Bath Filter for Tub Faucet - 10 Stages Bath Water Filter 2 500 Gallons Removes Contaminants & pH Balancer Improved Skin Hair and Nail Condition - BPA-Free & Easy Install (White)**JYFJYF**$14.85**170 rev10mo ago](https://www.amazon.com/dp/B0FT7R9ZQ9)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**KOSNEW Bath Faucet Filter 10-Stage Advanced Shower Water Filter for Tub with 3 000 Gallon Non-Spill Filtration Removes Chlorine Fluoride Hardness for Baby-Safe Sensitive Skin Soft Bath Water**KOSNEW**$25.03**4.2★**▲ 215%**](https://www.amazon.com/dp/B0GR4L8BVN) [**15-Stage Bath Water Filter for Tub Faucet Yvelines 7500 Gallons Bathtub Filter Softens Hard Water & Removes Chlorine for Healthier Skin & Hair BPA-Free (White)**YVELINES**$28.76**4.0★**▲ 212%**](https://www.amazon.com/dp/B0GY4C5KRM) [**Canopy Baby Bath Tub Filter Gentler Water Filtration for Delicate Skin | Reduces Chlorine & Irritants | BPA-Free Silicone Spout Cover | Easy Tool-Free Install | Activated Carbon Filtration**Canopy**$84.90**4.1★**▲ 176%**](https://www.amazon.com/dp/B0FLN3N4T1) [**SHLLKTTRY Bath Water Filter for Tub Faucet with Overflow Filtration Remove Contaminants Chlorine Fluoride Hard Water Softener Enhances Health of Skin Hair Nails Relieve Eczema 3 000 Gallons White**SHLLKTTRY**$27.57**4.6★**▲ 94%**](https://www.amazon.com/dp/B0D3ZYMYCP) [**Bathtub Water Filter for Tub with Overflow 2 500 Gallons of Filtration 8 Stages Bath Filter Remove contaminants Chlorineand Fluoride Hardwater Softener BPA Free(Upgrade Version) Pink**SHLLKTTRY**$20.84**4.1★**▲ 64%**](https://www.amazon.com/dp/B0DC3JQ34R)
**~~View all trending →~~**
## **What buyers say about bathtub water filter**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Filtration**18%
*“Effective filter”*
**Assembly/Installation**16%
*“Installation was a breeze”*
**Value For Money**7%
*“Worth Buying”*
**Soft Feel**7%
*“My skin feels softer”*
**Ease Of Use**6%
*“Easy peasy”*
**Quality-Overall**6%
*“Good quality, easy to assemble”*
**Efficiency**4%
*“its been doing a good job”*
**Smell**3%
*“there was no harsh smell anymore”*
**Water Resistance**3%
*“My house utilizes well water”*
**Spray/Flow**3%
*“Water pressure is still great”*
### **What buyers complain about **
**Filtration**17%
*“Not a good filter”*
**Leak-Proof**8%
*“its leaking”*
**Smell**6%
*“the smell is not pleasant at all”*
**Functionality-Overall**6%
*“Doesn't work well”*
**Water Resistance**5%
*“There is water squirting out of every slit”*
**Allergies**5%
*“Surprised that my skin dry and itchy”*
**Durability**5%
*“Doesnt last”*
**Value For Money**4%
*“Price couldve less”*
**Quality-Overall**4%
*“Very disappointing quality control”*
**Assembly/Installation**2%
*“making installation tricky”*
### **Top return reasons **
**Filtration**27%
**Size-Overall**23%
**Compatibility-Overall**8%
**Functionality-Overall**6%
**Leak-Proof**6%
**Value For Money**5%
**Advertised Vs Actual Product**4%
**Defective Material/Parts**3%
**Product Condition**3%
**Color**3%
## **Common questions**
- **Is bathtub water filter profitable to sell on Amazon United States?**
- The niche generates $1.4M/yr across 17 tracked products. 5 of 6 products launched in the last 360 days are still selling. 90-day search growth is -20.8%. Flapen's verdict: Worth a look (55/100).
- **How competitive is the bathtub water filter niche?**
- 12 brands and 31 sellers compete. The top 5 products take 67% of clicks and top 5 brands hold 81% of demand.
- **What do buyers complain about in bathtub water filter?**
- Top complaints mined from reviews: Filtration, Leak-Proof, Smell. The return rate is 1.6%.
- **When does demand for bathtub water filter peak?**
- Demand peaks in Jan–Feb–Mar; the busiest month runs 2.1× the quietest.
- **What does it cost to enter the bathtub water filter niche?**
- Listings span $12.95–$88.34; the average listing price is $35.31 (sweet spot $15–$100). The average incumbent carries 4,744 reviews — the moat a new listing must climb.
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