v3: Improved design for a wider nozzle angle.

v2: I tuned the design so the ball nozzle wouldn't move freely without the water pressure.

I made this jet for our pool. We have the pipe that comes back from the filtration built into the wall itself. The jet fits in and you can change the direction of the flow with the rotating “ball nozzle”.

Don't forget to remove the jet from the pool for winter! (water gets inside and might crack it when frozen)