SENSEN – 4 mm Non-Return Valves
SENSEN 4mm non-return valves protect your air pump from water damage. A non-return valve is fitted to ensure air flows through the hose in one direction. This can be caused by power outs and when air pumps are located below the height of the air stones. Cheap insurance. SENSEN Australia’s Best Submersible Small water pumps Sale Direct Near solar, fountains, ponds, Hydroponics and water features.