AQUARIUM / POND NON RETURN VALVE 4 5 6 8 10 12 20 28mm

NON RETURN VALVES 

Perfect for protecting back flow of water to air pumps.

These are non pressure valves - They do not need to reach a certain pressure to open as long as there is a flow it will open.

Can be used in - Aquariums, Ponds, Medical equipment, Irrigation, Oil, Gas, Ozone, ect

Made from food grade materials - Non toxic Acid and Alkali resistant All sizes are shown in the pictures. 

To choose the right size measure the Inside Diameter of the tube / pipe you are using, this is the size to select.