This little adapter lets you boost your sprinkler up above your bedding plants for more efficient coverage. Just screw your sprinkler onto one end, your hose onto the other, and then the clamp in the middle slips over the top of a piece of ½" rebar (or other similarly sized rod) of the height of your choice.

In addition to the printed parts, you'll need:
1 - hose washer
1 - ¼-20 x 1.5" bolt
1 - ¼-20 nut
1 - piece ½" rebar, as long as you need

Printing
All parts print as shown. I used PLA but PETG would work well too. Use at least 5 perimeter lines.

Assembly
Insert the hose washer into the female end of the adapter. Screw the adapter into the clamp. Press the nut into one side of the clamp and the bolt into the knob. Thread the bolt through the hole in the adapter and into the nut. Leave loose for now. 

Screw the adapter onto your hose and screw your sprinkler head onto the other end. Push your rebar post into the ground and slip the clamp over then end. Rotate the adapter in the clamp to get it level, and then tighten the clamp knob. Sprinkle.