I use this pump sprayer only for water, as it is my water supply for a water bottle rocket launcher. I got tired of constantly having to manually pump the water container when I was already using an air compressor to fill and pressurize the water bottle rockets.
This is when I took on the task of building a threaded adapter that could be glued to a standard PVC coupling. Then I can add pneumatic accessories, like an adjustable pressure valve and a shutoff valve.
Because of the way the threaded adapter was designed, I decided to split it into to parts, so I could print the threads without needing supports. Then by gluing the ABS 3D printed thread adapter parts onto the PVC coupling with PVC/ABS glue, I was able to make a pretty solid pump sprayer pneumatic adapter.
