A random question: My place was built with all the plumbing for a central-vac system that I have no intention of using ever. What alternative uses might I have, for this idle series of tubes? Right answers, speculative answers and hilariously wrong answers equally welcome.
@mhoye one of the best tips I got from an experienced builder and hacker is that extra pipes are a Good Thing. Save them for later, your future self will thank you.