Re: Drinking water tank water.
I fill my main tanks through an omnifilter whole house filter that I have modified so that I can attach a garden hose. I also treat the tanks with bleach at each fill up. The water in my main tanks taste good, better than some municipal water ive had. But I don't drink from the main tanks typically.
For drinking water I have two 5 gallon food grade jugs that are mounted in the lazarette. They are easily removable for thorough cleaning or replacement if they get funky. I can fill those with bottled water or from the omnifilter.
I have a separate pump/faucet at the galley sink for those tanks. A hand operated pump for drinking water, a foot pump for wash water.
1977 Bristol 29.9