Tubing routed through Conduit

[Marc Morin]

I've seen plenty of odd things...but what is this? Flexible copper tubing routed through gutted electrical boxes and conduit. None of it appears to connect to plumbing and it may well be abandoned. The known galvanized and copper water supply piping were verified as active so this system is a mystery.
1920's triplex (once a six unit).

[John Kogel]

That looks like what you said, they pulled out the old wiring and installed gas lines. Creating a monster. :D