3/8" NPT X 1" Hose Barb Fitting

thingiverse

This is an NPT connector that's likely hard to locate at your local hardware store, or so it seems. What it does is convert a 3/8-inch NPT thread into a hose with a 1-inch ID. I created two types of adapters: one has a single barb and the other has three. Each one comes in both solid and hollow versions. The solid version might be useful if you need to drill a single hole through it, going all the way through. Most of the time, I have to scale up my designs by 10 before they're ready for my slicer. It could be because I design them using millimeters, while my slicers expect centimeters.