Aquarium Air Pump Check Valve (10-Pack)

Prevent water backflow into your air pump with these reliable one-way check valves, designed to keep your aquarium setup safe and running smoothly. Standard 4mm port size fits most aquarium air tubing Durable plastic construction for long-lasting performance Normally open design allows continuous airflow while blocking reverse flow Ideal for use with air pumps, CO2 systems, and aerators Perfect for maintaining a secure and efficient aquarium environment.