For Oxygen Pumps Only: Excellent one-way check valve for most common aquarium air pumps. NOT suitable for CO2 or other high pressure systems to prevent cracks and leaks. Add little weight to your hose for smooth airflow.Ideal Pump Protectors: Prevent backflow of water through the tubing during a power outage or pump break. Essential accessories for the basic aeration setup in your aquariums.Sturdy and Quiet: Made of reliable plastic that can be tightly connected to the hose without air leakage. Durable to withstand long time use without making noise. Easy maintenance: clean the valve regularly. Please push it with a thin stick from the inlet side to open it when it is obstructed inside and restrict the airflow.
