Hey Red, on our Feather x18d the valves are located on the back of water heater tank. Turn both quarter turn to shut off the tank supply than turn on the bypass between the two. Our water heater and pump are located in the same compartment under the dinette seat. Your location may be different, hopefully someone else here on the forum can give you the exact location.
Here is a link to your manual, they're pretty generic though but are the same ones provided at the time of sale from the dealer. Just copy and paste this link in your browser:
Just tap 2013 Jay Feather towables to download.
Page 8-5 draining & winterizing.
Hope this helps. Good luck.. Happy camping..
Sent from my Nexus 7 using Tapatalk