Modular water fountain head/nozzle for 13mm (1/2 in) tubing

This is a set of output nozzles to fit 13 mm (1/2 in) tubing.

The core part, Universal 13 mm fitting, attaches to the tubing, and all of the other items marked Cap fit onto it. The caps are:

1. Cap - Dome (pictured above) creates a sheet of water that mushrooms outwards. Outer casing fits onto the universal fitting, and then Reflector fits inside that. The two pieces are joined by a 3 mm rod (I use a bamboo skewer) with a friction fit. Set it up so that the reflector is higher than you need it, and then gently tap it down until you get the desired water behaviour. Be sure that your rod does not interfere with your pump's impeller.
2. Cap - Solid can be used to keep gravel out of the pump tubing while you're building the fountain.
3. Cap - 3 divisions has 3 openings in the cap. The water comes out in three streams at an angle of about 45°.
4. Cap - 4 divisions has 4 openings in the cap. Again, 45° angle streams.
5. Cap - 4 uneven divisions with central jet has four openings around the edge of the cap, one of them larger than the others so that more water is output in that direction. The middle is open so that a stream of water is shot straight up also.

I also provide the Fusion 360 files (*.f3d) so that you can change the sketches to suit yourself.