Finco Airline Non-Return Valve 2pc

It’s a one-way valve placed in the airline tubing between your air pump and the aquarium. It allows air to go into the tank, but stops water from flowing back toward the pump.

⚙️ Why It’s Important

If your air pump is below the water level or if there’s a power outage:

• Water can siphon backward through the tubing
• This can damage the air pump or even cause electrical hazards

The valve prevents this by automatically blocking reverse flow.

🔧 How It Works (Aquarium Version)

• When the pump is running → air pushes through the valve into the tank
• When airflow stops → the valve closes, stopping water from moving back

🧩 Where to Install It

• In the airline tubing
• Usually above the water level (but still works below if needed)
• Follow the arrow on the valve showing the direction of airflow