b&b model 571 check valve
Worth a lookShows demand growing +154.5% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Growth
Incredible+154.5%90-day search growth — must beat 0% to launch
Avg price
Incredible$24.06avg listing price — sweet spot $15–$100
Review moat
Great142.86avg incumbent reviews — the moat a new listing must climb
Price range
Great$13.69–$59.39cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Great11.2%search→purchase rate — share of searches ending in a sale
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Returns
Good2.9%return rate — above 6% kills the launch gate
Brand share
Okay80%top-5 brand share — brands hold most of the demand
Competition
Bad75%top-5 click share — a locked-up shelf
Market size
Bad$47K$47K/yr · 17K searches
Competition
The top 5 products capture 75% of clicks — a locked-up shelf that new listings rarely crack.Brands
13 falling
Sellers
51
Top-5 brand share
80%
Open market
16%
- Lisnhlin25%
- RecPro21%
- folosem18%
- NOVINO11%
- Dusledel5%
- MIYIMORE4%
- Open — no brand owns it (7 brands, 16%)
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 14 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
RecPro RV Vacuum Breaker Check Valve | Protect Fresh Water From Pollutants 571-VAC-CHK-A | Made in America
RecPro$24.964.6★1,039 rev
RV Vacuum Breaker Check Valve Fit for b&b Model 571 Check Valve 571-VAC-CHK-A Camper Trailer Flusher Check Valve Replace Backflow Preventer on Black Tank System Prevent Leaking Improve Freshwater
folosem$16.794.0★41 rev
RV Vacuum Breaker Check Valve Fit for b&b Model 571 Check Valve 571-VAC-CHK-A Camper Trailer Flusher Check Valve Replace Leaking Vacuum Breaker on Black Tank System
Lisnhlin$18.774.1★103 rev
Upgraded Brass RV Vacuum Breaker Check Valve 571-VAC-CHK-A Camper Trailer Flusher Check Valve fit for b&b Model 571 Check valve Replace Leaking Vacuum Breaker on Black Tank System 1/2 DN Male
Lisnhlin$28.794.1★66 rev
RV Vacuum Breaker Check Valve Camper RV Black Tank Flush Check Valve Replace Leak Vacuum Breaker on Black Tank System Loud Noise & Wet Floor Camper Backflow Preventer Improve Freshwater 571-VAC-CHK-A
NOVINO$18.494.1★355 rev
Newest
by launch date
Rogierra RV Vacuum Breaker Check Valve 571-VAC-CHK-A Brass Backflow Preventer for RV Black Tank Flusher System - Fix Leaks Noise & Wet Floor Compatible with Model 571 1/2 Male Thread
Rogierra$24.928 rev
RV Vacuum Breaker Check Valve Fit for b&b Model 571 Check Valve 571-VAC-CHK-A Camper Trailer Flusher Check Valve Replace Backflow Preventer on Black Tank System Prevent Leaking Improve Freshwater
folosem$16.7941 rev
Upgrade 1/2 MPT 571-VAC-CHK-A RV Vacuum Breaker Check Valve for Camper RV Black Tank System Replace b&b Model 571 Check valve 2-Year Warranty
supeiqality$16.0630 rev
Upgraded Brass RV Vacuum Breaker Check Valve 571-VAC-CHK-A Camper Trailer Flusher RV Tank Check Valve for b&b Model 571 Check Valve Replace Leaking Vacuum Breaker on Black Tank System
maXpeedingrods$24.8715 rev
Upgraded Brass RV Vacuum Breaker Check Valve 571-VAC-CHK-A Camper Trailer Flusher Check Valve fit for b&b Model 571 Check valve Replace Leaking Vacuum Breaker on Black Tank System 1/2 DN Male
Aimery$28.5322 rev
Trending
90-day click momentum
ACA RV Vacuum Breaker Check Valve for Black Water Tank Flush
ACA$13.694.1★
RV Vacuum Breaker Check Valve 571-VAC-CHK-A Camper RV Black Tank Check Valve Replace Leaking Vacuum Breaker on Black Tank System Protect Freshwater From Backflow Fix Loud Noise & Wet Floor
MIYIMORE$17.514.0★
Rogierra RV Vacuum Breaker Check Valve 571-VAC-CHK-A Brass Backflow Preventer for RV Black Tank Flusher System - Fix Leaks Noise & Wet Floor Compatible with Model 571 1/2 Male Thread
Rogierra$24.924.8★
Upgrade 1/2 MPT 571-VAC-CHK-A RV Vacuum Breaker Check Valve for Camper RV Black Tank System Replace b&b Model 571 Check valve 2-Year Warranty
supeiqality$16.064.0★
Dusledel Upgraded 571-VAC-CHK-A Brass RV Vacuum Breaker Check Valve 571 Camper Trailer Flusher Backflow Preventer on Black Tank System Fix Loud Noise & Wet Floor Replace Leaking Improve Freshwater
Dusledel$30.134.2★
Demand & seasonality
Weekly Amazon search volume, last 101 weeks — +154.5% search growth over the last 90 days.Peak months: May, Jun, Jul · busiest ÷ quietest = 4.8×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Fit perfect”
“Worked as it should”
“This valve is well made”
“Easy install”
“Easy install and no more leak”
“Works great”
“The product works as designed”
“now our black tank clean out works fine”
“Perfect fit thick durable material”
“Great Check Valve”
What buyers complain about
“Leak for valve”
“Does not fit”
“Wont last”
“Junk”
“youll have a mess on your hands”
“Finding the breaker took more time than replacing”
“didnt work”
“The previous one was clogged due to a salamander getting inside the line”
“I think it is over plastic”
“Doesn't fit all types of vacuum breaker fittings”