You can go to: https://www.thormotorcoach.com/owners/
, create an account, then using your VIN, you can get to many different pieces of information about your particular MH, including plumbing diagrams. If you have a problem there, call Thor Customer Service (1-877-855-2867) and give them the VIN and they will send you the diagram. They have been very helpful to me.
Good luck with the leak!
2018 Thor Miramar 35.3
2012 Jeep Liberty
5 Star Tuner, Blue Ox, Towtector