I don't like many of the fancy new pressure water
pumps with their fancy proprietary pressure switches....which seem to fail way too soon and are totally non-serviceable. In my experience they typically fail way before the other pump components (which typically have a very long service
life)....invertible sticking you in some remote
location with the need to get expensive proprietary parts
For cruising use, I want something that is simple, serviceable, and ideally available just about anywhere. So, when my last fancy little integrated pressure switch failed, I by-passed it and wired in a common well pump pressure switch. Simple, serviceable (every piece of one of these can be accessed with basic hand tools), a way long service
life -- I've been running these at home for years, adjustable (many of the fancy ones are not), and available in any decent hardware
store world wide.
I like this solution much much better. Oh, and they cost 1/3 to 1/2 of what the fancy yachtie ones cost (that's before including shipping
to far away places).