Non-return valves

Find here all our non-return air and water valves for spas. In order to help you in your search, you will find below the inside diameter of the different female connections of the check valves. These dimensions also represent the outside diameters of the male connections and the pipe sizes, of course.

• 1/2 inch: 21 mm
• 3/4 inch: 27 mm
• 1 inch: 33 mm
• 1.5 inches: 48 mm
• 2 inches: 60 mm
• 2.5 inches: 73 mm