Reply to "Fuel filter change"

George PAdmin.

The numbering of AN tube fittings relates to the size of the tubing, not the wrench size required by the tubing nuts. The "dash" numbers express the tubing size in sixteenths of an inch:

AN-4 = 4/16 = 1/4" tubing

AN-6 = 6/16 = 3/8" tubing

AN-8 = 8/16 = 1/2" tubing

AN-10 = 10/16 = 5/8" tubing

the sizing of plastic & metal tubing is based upon the outside diameter, the sizing of flexible (i.e. rubber) tubing (aka hose) is based upon the inside diameter.

-G

6/12/117:22 PM

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