Air gap intake and heater hoses

Here's my 1/4" mip x 1/2" hose... you don't think this will work? The hole through the center only has a small step in it (like 0.1).
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^^^^^^^^^^^^
LOL, agree w/ that. What most people don`t realize is, that pipe sizes "are" the inside diameter of said fitting or pipe. I don`t think I`d run a 1/4" m.i.p. x 1/2" hose barb fitting on anything tho!