We have a Katadyn
160 - it's wonderful even after 2 years use. Take a LOT of prefilters and filters if you're in seawater. Watch where you make water
on the water or near anchored boats (sewer), and do NOT use chlorinated water anywhere near your watermaker system (ie rinsing out filters!) Do not use paper filters, only the reusable poly type - you can drag these behind the boat on a string to clean (really).
We use a 20micron (pre) then a 5 micron filter. Also, be sure to get pickling power if you're not going to use it for awhile, and/or use it every couple days to keep it in good condition. We use ours a lot with a new washing
machine aboard (even with (2) 100 gallon tanks
- But, we never worry about our water quality.
It's amazing how much water a boat can use, and how hard work (and expensive) it can be to carry jerry jugs from a dock
back to a boat...if/when you can get good water! We've gave water to other cruisers who were out of fresh water so they could stay at a great tropic island anchorage longer.