grey water hose
Worth a lookShows low returns (0.7%), but brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list.
Returns
Incredible0.7%return rate — above 6% kills the launch gate
Growth
Incredible+147.5%90-day search growth — must beat 0% to launch
Conversion
Incredible13.7%search→purchase rate — share of searches ending in a sale
Review moat
Okay1,661.88avg incumbent reviews — the moat a new listing must climb
Avg price
Okay$11.80avg listing price — sweet spot $15–$100
Price range
Okay$5.50–$23.12cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Okay$185K$185K/yr · 114K searches
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Competition
Okay69%top-5 click share — leaders hold, buyers still browse
Brand share
Bad98%top-5 brand share — brand-locked demand
Competition
The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.Brands
6 rising
Sellers
83
Top-5 brand share
98%
Open market
0%
- Camco36%
- Valterra30%
- Aussio12%
- Colingmill12%
- TonGass8%
- WKZO2%
- Open — no brand owns it (0%)
Product shelf
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
Camco 39463 Sewer Cap With Hose Connect Black 3/4
Camco$6.864.8★6,839 rev
Valterra 1216.1015 Products Inc. T1020 3 Black Termination Cap with Bayonet Hook
Valterra$5.504.8★3,830 rev
Aussio (2-Pack Black T1020-1 Waste Valve Cap with Bayonet Hook 3 with Capped 3/4 GHT RV Sewer Cap
Aussio$15.134.2★250 rev
Valterra T1020-1 Waste Valve Cap - 3 with Capped 3/4 GHT Black
Valterra$7.334.7★5,714 rev
TonGass 3 RV Sewer Valve Cap with Handle Easy-Grip Waste Valve Cap for RV Camper & Travel Trailer Secure Seal Leak Prevention Easy to Install & Use - Black 2-Pack
TonGass$23.124.9★30 rev
Newest
by launch dateTonGass 3 RV Sewer Valve Cap with Handle Easy-Grip Waste Valve Cap for RV Camper & Travel Trailer Secure Seal Leak Prevention Easy to Install & Use - Black 2-Pack
TonGass$23.1230 rev
WKZO Replacement RV Sewer Cap - Heavy-Duty ABS Plastic Universal Fit for Most RVs & Trailers Leak-Proof Waste Tank Cap with Secure Locking Clamp (Black 3.75)
WKZO$13.3232 rev
TonGass RV Sewer Cap with Lanyard Compatible with Camco Rhino Portable Waste Tank RV Sewer Hose Storage Cap for Camco Camper - Prevents Leaks & Spills from RVs Sewers System - Black 1-Pack
TonGass$9.9231 rev
Colingmill RV Sewer Valve Cap with Handle - 3 RV Sewer Cover Waste Valve Cap for Camper Trailer Easy to Install & Use(1 Pcs Black)
Colingmill$15.14134 rev
Colingmill RV Sewer Valve Cap with Handle - 3 RV Sewer Cover Waste Valve Cap for Camper Trailer Easy to Install & Use(1 Pcs Clear)
Colingmill$14.95134 rev
Trending
90-day click momentumTonGass RV Sewer Cap with Lanyard Compatible with Camco Rhino Portable Waste Tank RV Sewer Hose Storage Cap for Camco Camper - Prevents Leaks & Spills from RVs Sewers System - Black 1-Pack
TonGass$9.924.9★
TonGass 3 RV Sewer Valve Cap with Handle Easy-Grip Waste Valve Cap for RV Camper & Travel Trailer Secure Seal Leak Prevention Easy to Install & Use - Black 2-Pack
TonGass$23.124.9★
Colingmill RV Sewer Valve Cap with Handle - 3 RV Sewer Cover Waste Valve Cap for Camper Trailer Easy to Install & Use(1 Pcs Clear)
Colingmill$14.953.8★
WKZO Replacement RV Sewer Cap - Heavy-Duty ABS Plastic Universal Fit for Most RVs & Trailers Leak-Proof Waste Tank Cap with Secure Locking Clamp (Black 3.75)
WKZO$13.324.2★
Camco Rhino Flex Cap Bayonet and Elbow Cap - Seals Both Ends of Your Sewer Hose to Form a Odor Tight Connection While Storing (2 Pack) (39753)
Camco$8.764.5★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +147.5% search growth over the last 90 days.Peak months: May, Jun, Jul, Aug · busiest ÷ quietest = 3.4×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Awesome fit”
“No complaints”
“As advertised”
“Easy to use”
“Totally worth it”
“Cap works great”
“it is not leaking”
“the handles are easy to grab”
“I like the design”
“Sturdy”
What buyers complain about
“Very tight fit”
“Break easily”
“Very hard to get on”
“Cheap product”
“Cheap Plastic”
“Leaks”
“Break easily”
“Cap off that stink pipe”
“I just don't trust rubber cords on the caps to be secure enough”
“it doesnt work with the standard universal wrenches”