Cap and Plug for Intex sand pumps to protect them during seasonal storage.
I needed three more caps and four plugs to store the pump and tubing during winter to avoid insects and dust to go inside them, so I modeled the cap after the one included in the pump and custom-made the plug is to fit inside the pipe threads.

Both models are not tested for watertightness but seem fit enough to work in a pinch.

Printed mine with ASA for better outdoor resistance. If you don't plan to leave them outside, PLA/PETG/ABS should be good enough.