Check valve by Aqua One – Airline Backflow Blocker

One-way ticket for your airflow

Don’t let water sneak where it doesn’t belong - the Check Valve by Aqua One is your grow room’s insurance policy against backflow dramas. Whether you're running air pumps for hydro or a cheeky aquarium setup, this tiny but mighty valve stops water from siphoning back into your gear. Set it up and sleep easy.

🔹 Key Features

🔁 One-way check valve - blocks back-siphoning when pumps sit below waterline

💨 Designed for 4mm airline hose - tight, secure fit with zero fuss

🧩 Compatible with any Aqua One AirPump or standard 4mm air system

🌊 Works across all setups - coldwater, tropical, saltwater… or your hydro bucket

📦 Comes in a handy 2-pack - one for now, one for backup

🛠️ How to Use It

• Cut your 4mm airline tubing where you want protection.

• Insert the check valve - make sure the flow direction is correct (arrow side goes away from the pump).

• Use between air pump and water source, especially if your pump is below the water level.

• Pair it with Aqua One AirPumps and accessories for full airflow control across multiple devices.

🌟 Grow Guys Tips

• Always chuck a check valve on if your air pump’s near floor level - one slip-up and your pump could flood.

• Test airflow direction before final placement - saves you grief later.

• These are dirt cheap, so don’t skimp. Get a few and stash the extras.

• Works a treat in hydro reservoirs, DWC buckets, or anywhere you’ve got bubbler stones and air lines.

🧃 Perfect For

• Hydro growers running air pumps on or below tank level

• Aquariums of any kind - freshwater, tropical or saltwater

• DWC systems that need reliable oxygenation

• Anyone who’s ever mopped up a pump backflow disaster

📦 Specs & Stuff

• Fits standard 4mm airline tubing

• Pack size: 2-pack

• Material: durable plastic housing with directional flow arrow

• Use with Aqua One pumps or any compatible system

🚀 Stop the backflow before it bites

Tiny part, massive peace of mind. Add it to your cart and keep that airflow moving in the right direction - your pump will thank you.