Milky Spore Yard and Garden Applicator

These are parts to be used in conjunction with 2-inch Schedule 40 PVC Pipe to make an applicator for milky spore, or diatomaceous earth.  I printed them in TPU however any filament can be used. The parts all fit into the pipe like plugs, the lip that goes into the pipe is 52mm in diameter so they should fit slightly on the loose side.  The ID of the pipe has a tolerance of about 0.3mm. You can make parts tighter by lightly tapping inner edge of pipe with a hammer, or looser by scaling print or sanding inside pipe slightly. 

To make applicator as shown, you will want about 4 ½ feet of 2" Schedule PVC pipe cut into two pieces - one of 4 feet, the other about 6".  You will also need a 2" PVC, or printed, coupling. The coupling serves two purposes.  It helps keep the screen in and, in combination with the short piece of PVC pipe, it keeps dirt from clogging the dispensing screen.  You should print two of my caps - one closes top while using, the other closes end for storage. You need to choose one of my screens, they are cheap, fast prints and I would print all to see what you prefer. I prefer the 4mm x 20-hole version, after having tried the 4mm x 9-hole version shown in my photos and removed from design as inefficient.  The 4mm x 20 hole screen flows well, important since milky spore tends to clump like flour. The 6mm x 20-hole screen is intended for coarser products like ant granules or spot fertilizing.