1-1/2 FPT to 3/4 MPT Adapter
thingiverse
This adapter is useful for connecting a 3/4 garden hose to the drain of a utility sink, or any other 1-1/2 male npt connection. The outside diameter of the threads are 1-7/8 and 1-1/6. It is the inside of the pipe/hose diameter that is 1-1/2 and 3/4 inches.
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