Slip-Fit Versus Threaded
- A slip-fit spout has an internal assembly that slips over a copper pipe.
- The spout has an opening on the bottom side where a setscrew is tightened to hold the spout onto the copper pipe.
- A slip-fit spout does not contain threads.
Threaded NPT Spout:
- NPT refers to a standard thread size in the plumbing industry.
- An NPT spout has internal threads for threading onto a pipe nipple.
- The spout has an opening on the bottom side, but there is no setscrew. The pipe nipple would be visible inside the opening.
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