I'm traveling with a friend who is driving an alpine mh. He has had the o-rings in the one or more of the four check valves located on the top of the HWH contol head. I have a call into HWH and I am on their call list.
The last time the o-ring (s) ruptered a moble repair person installed what looks like over sized rings becase they split or were torn when the brass caps were screwed in. I have replaced the one leaking o-ring with 7/16 id and 9/16 od' and it has held the pressure.
Does any one know what the HWH spec calls for?
Bob and Bev
06 Itasca 40' Horizon KD