10pcs Aquarium Air Pump Check Valves Plastic One-Way Non-Return Check Valve Waterstop Accessory for Aquarium(7mm)

General description The 10pcs Aquarium Air Pump Check Valves are essential accessories designed for common aquarium air pumps. These one-way non-return check valves effectively prevent backflow of water, protecting your air pump and other equipment from potential damage. Made from durable transparent plastic, they are both functional and aesthetically pleasing. Technical specifications Material: Durable transparent plastic Size: 7mm Usage Prevents backflow of water when the air pump is positioned lower than the water surface. Allows the air pump to be placed above or below the water surface after installation. Not suitable for use with CO2 systems.