Contacted Advanced after finding them on here, had an appointment booked an hour after I left a message, and had them come by to fix the issue the next day. They repaired a burst line, capped off and disconnected my broken humidifier line, and fixed an improperly installed drainage valve within a couple of hours. They also gave me a quote for moving around all the pipes in my laundry room at the same time, so looks like there is already a new project planned for the spring!
Needed a plumbing company after moving into a new place and have definitely found the one I will be sticking with. :)