Slip-Fit Versus Threaded

Slip-Fit Spout:

• 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.