bathtub water filter
Worth a lookShows a sweet-spot price point ($35.31 avg), but soft demand (-20.8% this quarter) keeps it on the watch list.
Avg price
Incredible$35.31avg listing price — sweet spot $15–$100
Price range
Great$12.95–$88.34cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Great$1.4M$1.4M/yr · 933K searches
Returns
Great1.6%return rate — above 5% kills the launch gate
Quality gap
Great4.2★avg incumbent rating — lower means beatable quality
Conversion
Good4.2%search→purchase rate — share of searches ending in a sale
Brand share
Okay81%top-5 brand share — brands hold most of the demand
Competition
Okay67%top-5 click share — leaders hold, buyers still browse
Review moat
Bad4,744.18avg incumbent reviews — the moat a new listing must climb
Growth
Bad-20.8%90-day search growth — must beat 0% to launch
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
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.Peak months: Jan, Feb, Mar · busiest ÷ quietest = 2.1×
Top bathtub water filter search terms
- canopy bathtub filter80K/yr
- bathtub filter92K/yr
- bath filter for tub104K/yr
- bath tub filter79K/yr
- bath filter80K/yr
- bathtub water filter78K/yr
- bath water filter76K/yr
- bathtub filter for tub faucet47K/yr
- canopy water filter26K/yr
- water filter for bathtub35K/yr
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.
All 17 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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$84.904.1★137 rev
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$27.444.3★914 rev
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$88.344.1★137 rev
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$21.434.0★2,382 rev
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$25.214.3★914 rev
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$28.7619 rev
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$25.0380 rev
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$88.34137 rev
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$27.57206 rev
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$14.85170 rev
Trending
90-day click momentumKOSNEW 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$25.034.2★
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$28.764.0★
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$84.904.1★
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$27.574.6★
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$20.844.1★
What buyers say about bathtub water filter
What buyers praise and complain about, mined from review topics.What buyers love
“Effective filter”
“Installation was a breeze”
“Worth Buying”
“My skin feels softer”
“Easy peasy”
“Good quality, easy to assemble”
“its been doing a good job”
“there was no harsh smell anymore”
“My house utilizes well water”
“Water pressure is still great”
What buyers complain about
“Not a good filter”
“its leaking”
“the smell is not pleasant at all”
“Doesn't work well”
“There is water squirting out of every slit”
“Surprised that my skin dry and itchy”
“Doesnt last”
“Price couldve less”
“Very disappointing quality control”
“making installation tricky”
Top return reasons
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.