This might be considered an essential. It’s high on the list anyway. You might want to consider installing a permanent, good quality water filter on your galley water supply. My wife is rather particular about the water she drinks, and her ice tea. She does not care for “boat tank” water, unless that is, it’s clean and it has been run through a good filter.
Another reason for this is to eliminate the need for bottled water aboard. This can save a lot of storage space, a lot of trash, and a lot of money. When the crew can fill their water bottles from the Galley, it’s much better for the environment too. In the USA, we use 8 million bottles of water a day. Most of those end up in our land fills. On the ocean, they end up on pristine beaches.
We have an “NSA” filter, but I’ve seem more boats with the “Seagull” filter under their sinks. We rigged ours a little differently, I plumbed it off a separate smaller 22 gallon tank, with it’s own pump and faucet. It’s virtually a separate water system. I guard the quality of this 22 gallon tank very carefully. It will last my wife and I nearly a month when making drinks and filling our water bottles. If something were to ever happen to our main water pump, we have a back up pump reedy to go should we need it.