As a matter of fact that is how the hoses and tubes are differentiated. Remove any attachments if theres anything attached to the hose like couplings spray nozzles or a soaker hose.

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How to measure hose diameter. Simply put a dash size refers to a id. For example 8an hose has the same id as a 12 nominal tube 816 12. How to measure garden hose diameter 1. Remove the spray nozzle or any other attachments to your garden hose. This should be the exact inside diameter of your garden hose. Finally measure the diameter of the inserted side of the paper tube with a ruler or tape measure.
For example 6 hose would indicate a hose with id. Carefully remove the paper tube from the hose without letting it unravel. Of 616 or 38. Steps in measuring garden hose diameter step 1. This means that 6an hose will not introduce any appreciable flow restriction in a fuel system designed around 38 od rigid tubing. Standard sizes include 12 inch 58 inch 34 inch and 1 inch hoses.
Disconnect all fittings or attachments from the ends of the garden hose including couplings soaker hoses spray nozzles and lawn sprinklers. Roll an index card into a tube like a straw and insert one end into the open end of the garden hose. Try and check if any of these dowels fit into the. Hoses are measured by inside diameter unlike tubes which are measured by outside diameter. Use a dowel now youll need a wooden dowel of various sizes. How to measure garden hose diameter.
The an numbers refer to the tubing od in sixteenths of an inch. 3an hose has the same id as a 316 tube. Allow the tube to open until the edges rest on the inside edges of the garden hose. Insert a 12 inch wooden dowel into one end of the hose and check the fit. Of a hydraulic hose or fitting in 116 increments. Try a 58 inch wooden dowel.