I doubt that you will need anything like that frequent a flush with acid. I don't know how much calcium is in your water, however. Do any of these things happen?
1. Coffee maker gets white scale and slows down frequently, requiring a run with vinegar?
heads clog frequently with white scale?
3. It takes a lot of soap to make any suds?
At one extreme you've got distilled water, at the other, some of the stuff we get in Florida
, which comes out of limestone caves. Even here, once in several months will do.
Scale build-up in my experience is one of the lesser problems with Jabsco heads. Getting something (cherry pits, in one of my less pleasant memories) caught in the joker valves is number one. Never put anything in one that has not gone throught a digestive track, and never serve cherries with dinner.
If you get to more specific questions, perhaps you will be blessed with the wise counsel of Peggy Hall, the forum's Princess of Poop. She wrote the book, literally, on boat