1 1/4 - 11 1/2 NPTF Cap

DO NOT USE UNDER PRESSURE
I made this cap to cover up a water line. The cap threads on nicely but we turned the water on just to check and it blew off. It will work fine for us as we have the water shut off but I would not recommend using it on a pressurized line. It is a standard 1 1/4 - 11 1/2 NPTF female threaded cap.

I didn't want to waste any filament so I printed it open side up without supports. You can tell in one of the pictures it was a little stringy bridging the opening at first but it works fine for what I needed.