I maintained the systems that Home Depot uses for a few months back in the 90’s… they use them to send cash between the registers and the safe at the back of the store.
The tubes sure seem cool when they work but I easily could have made it a full time job driving up and down the interstate responding to calls about stuck canisters. The junction boxes they used were notorious for not aligning holes with enough precision to allow the payload to pass through. Depending which junction box had the jam, it could shut down anywhere from two registers to the entire store (which, for me as the responder, was a “drop everything and go fix it now” scenario).
Not a task for those afraid of heights… the tubes run along the ceiling which meant I had to clip into a forklift and get raised all the way up there.
