When I changed mine I had to reach up behind the wall it is mounted on and undo the pipe fitting. Used water pump slip joint pliers to get it starting turning and then used my hands after that.
Good luck and not the easiest thing to get at.
2002 Monaco Windsor 40PKD. Marjorie 2.
2015 Equinox V6 Roadmaster tow setup
1996 Fleetwood Bounder 36S P32, Sold Oct. 2nd, 2020. Yay.