OK I don’t even thing I need to spend $3 in parts to make this. Most likely I have everything I need already. I like this build, it adds a simple pressure relief value to your dust collection system, which can be good as if something gets jammed in your line, the bucket could get sucked in. I think I will be adding one of these to my system.
https://www.instructables.com/DIY-3-Air-Pressure-Release-Spring-Valve/