Inline CO₂ bubble counter with check valve
Original price was: $9.99.$6.99Current price is: $6.99.
In stock
Keep your CO₂ system accurate and protected with this inline bubble counter. The clear chamber makes it easy to monitor bubble rate, while the built-in check valve prevents water from creeping back toward your regulator.
⚠️ If there’s a long run of CO₂ tubing after the Bubble counter check valve, we suggest adding one of our Stainless Steel Check Valves closer to the diffuser. This prevents water from filling the line, which can create backpressure, delay CO₂ flow, and put stress on your fittings.
Standard Inline Bubble Counter
Install it anywhere along your CO₂ line for clear, accurate bubble counting — even if your regulator is tucked out of sight. The integrated check valve adds essential backflow protection.
Splitter-Ready Counter
Unlike regulator-mounted counters, this inline version can also be placed down the line from your regulator. This allows you to connect directly to one of our CO₂ splitters near additional tanks — no need to run long hoses all the way back to the regulator.
⚠️ Note: If using as a splitter hub, keep the chamber dry (do not fill with liquid).
✅ Bubble counter + check valve combined in one compact design
✅ Clear acrylic chamber for easy bubble monitoring
✅ Built-in check valve protects your regulator from backflow
✅ Flexible placement anywhere in your CO₂ line
✅ Splitter-ready for multi-tank setups without long hose runs
✅ Extra security possible with stainless check valves near diffusers in long-line setups
Q: What liquid should I use in the bubble counter?
A: We recommend organic vegetable glycerin. It’s safe, crystal clear, and won’t evaporate.
Q: Can I use this with a CO₂ splitter?
A: Yes — place it down the line and connect to a splitter where needed. Just don’t fill the chamber if using it in splitter mode.
Q: Why choose an inline counter instead of one mounted on the regulator?
A: Inline counters give you flexibility — you can position them for best visibility or near the tank that needs CO₂, instead of being locked to your regulator.
