The only other water that does not cause much buildup is an R/O (reverse osmosis) under the sink filter. It is close to distilled water and takes out most minerals. I use it in my espresso machine with no buildup. I do not drink or cook with it otherwise because it leaches out minerals in your body like drinking distilled water would unless you supplement it with minerals that are in the form of liquid to “re-mineralize” it.
But using it for your machine will solve the lugging problem. And if you add trace minerals back, it is better than any tap water anywhere in the world.
]]>