
I have seen folks use the compressors out of old frig’s do this, but this is a first time for one of the little tire pumps that I have seen. Its a nice build if you want to make a vacuum pump. And in theory, you could continue to use it as a tire compressor too.
Why do this? Well you can use it for a mini vacuum chamber. Or as a part hold down.
https://www.instructables.com/id/convert-a-tire-inflator-type-air-compressor-into-a/