Airless gun extension hose adapter
Description
The purpose of this adapter is to clean Graco-style gun extensions using a garden hose during an airless spray paint job. If you use a single extension for an entire paint job in one day, then there is no need for this adapter. However, if you switch extensions during a job, there is no quick way to clean the first extension before continuing with the paint job. With this adapter, you can remove the first extension, drain it of paint, attach one end of the adapter to a garden hose and the other end to the extension, and then run water through it for a few seconds. The extension is now clean, and the paint job is only briefly interrupted. The male end of the adapter is 7/8" and attaches to the extension, while the female end is 3/4" and attaches to the garden hose (dimensions are nominal). In my tests, the adapter leaked slightly, even with washers. Since it is not meant to hold pressure, this doesn’t concern me too much. However, the leakage should be noted if someone wanted to base a new design on this part. This design was based on another Onshape design I found. I particularly liked the knurled knob on the garden end in the original design. I printed it using Ender brand PLA+ on a Creality Ender-3 V3 SE. The male end was positioned on the build plate, with a brim for safety, and no supports. I printed it with the skinny side down to avoid the need for supports.
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