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Old 02-12-2009, 18:06   #1
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Join Date: Dec 2009
Posts: 6
Reserve Osmosis / Watermaker / Water filter?


I hope this is in the right section.

My boyfriend & I are currently in the process of setting up to go cruising full-time in about 12 months. One of the items that we'll need is some kind of water desalinator / filter on the boat. What I'm trying to work out is what kind of a filter/product can you use to filter both salt water & fresh water to remove not only the salt, but all the other nasties that are in 'tap water'. The idea is to have something small/portable and if possible is manual.

Does anyone know what to recommend?

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Old 02-12-2009, 18:33   #2
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Join Date: Jun 2006
Location: Sai Kung, Hong Kong
Boat: FP Lavezzi 40 / Hatteras 48
Posts: 775
Do a search on this site for:

Reverse Osmosis Watermaker
Water Filtration

Anyway, FYI reverse osmosis requires a rather expensive machine which pushes saltwater at high pressure through a membrane to remove salt and yield fresh water. These machines are in the order of US $4000. for a 20gph device (plus installation).

Water filters remove impurities from water that is already fresh. They won't remove salt. However, they can render water safe and healthy for a modest amount of money. You can probably pop down to Home Depot and have a look at what they carry to get an idea of what the systems look like (marinized systems will do the same thing but will cost more!!).

Welcome to the forum and good luck on your adventure!
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osmosis, watermaker

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