Aquarium CO2 Check Valve, Used for Carbon Dioxide Diffuser to Prevent Backflow, CO2 Stainless Steel Check Valve, PU Pipe 4mm
Quick answer
Is $4.31 a good price for Aquarium CO2 Check Valve, Used for Carbon Dioxide Diffuser to…?
It is the usual price, not a deal: $4.31 is in line with the typical price of $4.31 that DipScout measured over the last 4 days. Tracked since Oct 23, 2026, the price hasn't changed.
$4.31
Today it costs $4.31 on AliExpress. Since Oct 23, 2026, when we started tracking it, the price hasn't changed. By our price history, it is not on sale right now.
No drop compared with what we observed over the last 4 days.
View on AliExpressThe price above is the last recorded reading, not a live checkout lookup.
Price history
$4.31
We started tracking this price on Oct 23. The chart takes shape over the days: we only draw prices we observed.
| Store | ZRDR Outlet Store Store |
|---|---|
| Product rating | — |
| Store rating | — |
| AliExpress category | Home & Garden › Pet Products |
| Recorded readings | 1 |
| First seen | 10/23/2026 |
| Last reading | 10/24/2026, 3:06:01 AM UTC |