I have a 2014 BH301 that I am going to de-winterize my camper this weekend. I have water connected already. Is there a valve, other than pressure relief, that needs to be opened/closed? Any help here is very much appreciated.
Do you mean -- to bleed the air out of the system?
If that is what you are wondering, you should also bleed the air out from all the faucets.
Make sure you have the dewinterizing valves turned to the correct positions.