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Old 02-02-2013, 11:04 PM   #1
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purified fresh water on board

anyone using a reverse osmosis water system in their boat? I'm never seen one and am thinking of installing one myself. You can never be sure how pure the water is you load in the tank so it seems like a good idea to me at least for cooking and drinking water..
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Old 02-02-2013, 11:30 PM   #2
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We buy it in the store for all our cooking and drinking. Almost always have it.
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Old 02-02-2013, 11:40 PM   #3
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Are you talking about a low pressure RO unit to clean your fresh water like they sell for household use or a high pressure RO unit to make fresh from salt?
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Old 02-02-2013, 11:44 PM   #4
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If you are going to go to the length of reverse osmosis, for drinking on board, you may as well just install a watermaker and be done with it. They effectively use reverse osmosis. Then you can just purify the water the boats sitting in. As for us, we are like Eric, (and I suspect many others), only we don't buy it, we take with us a couple of 15L insulated containers with taps, like one might use camping, filled with filtered city supply, and that lasts a week for drinking/cooking.
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Old 02-02-2013, 11:53 PM   #5
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We also take 10-15L spring water containers on board, but refill at home with tap water which is fine. A friend tired of doing that, he fitted a domestic water filter like you can fit at home, and likes it.
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Old 02-03-2013, 02:11 AM   #6
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bfloyd4445"anyone using a reverse osmosis water system in their boat? I'm never seen one and am thinking of installing one myself. You can never be sure how pure the water is you load in the tank so it seems like a good idea to me at least for cooking and drinking water."

Do you have the lead issues in mind or just dodgy water in general?
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Old 02-03-2013, 02:18 AM   #7
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Do you have the lead issues in mind or just dodgy water in general?
I'm pretty sure it is lead issues.
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Old 02-03-2013, 02:23 AM   #8
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I use a PUR filter on my galley faucet for all drinking and cooking water. Very effective and the new ones have a light that tells you when it's time to change the filter.
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Old 02-03-2013, 07:17 AM   #9
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I'm pretty sure it is lead issues.
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Old 02-03-2013, 10:12 AM   #10
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We had a watermaker on our previous boat for 15 years. When we were out of the U.S. we used it every day, mostly because there was NO source for fresh water. Traveling inside the U.S, we never used it and we never encountered water we were concerned about using or that made us ill. We have cruised in a lot of remote waterways and in marinas where the water came from wells. In many of these cases the water seemed better to us than municipal water supplies. We drink, cook and shower with the water from our tanks. Chuck
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Old 02-03-2013, 11:26 AM   #11
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I use a PUR filter on my galley faucet for all drinking and cooking water. Very effective and the new ones have a light that tells you when it's time to change the filter.
+1 on that, we have a PUR and use it all the time.

I've found, however, that many guests would die of thirst before they lowered themselves to drinking tap water. Honestly, I think it's more a fashion statement than anything. So I always stock individual-sized, name-brand bottled water so I don't end up with dehydrated crew.
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Old 02-03-2013, 11:31 AM   #12
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+1 on that, we have a PUR and use it all the time.

I've found, however, that many guests would die of thirst before they lowered themselves to drinking tap water. Honestly, I think it's more a fashion statement than anything. So I always stock individual-sized, name-brand bottled water so I don't end up with dehydrated crew.
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Old 02-03-2013, 11:38 AM   #13
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I use a PUR filter on my galley faucet for all drinking and cooking water. Very effective and the new ones have a light that tells you when it's time to change the filter.
+1
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Old 02-03-2013, 11:55 AM   #14
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If you happen to be floating in fresh water, you can certainly use a desalinator (watermaker) to make safe drinking water. Some manufacturers of RO watermakers caution against cranking the pressure up too high when doing this. I am guessing that the flow of product water gets too high and damages the membrane. Anyone?
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Old 02-03-2013, 11:56 AM   #15
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We drank water from a trickle in the corner of a beach on Porcher Island that was so brown you couldn't see through it, and it had a foamy head over an inch thick. Didn't treat it, and didn't get sick. We didn't treat any water while paddling for six months, and had no negative consequences. This was in areas that didn't see much human traffic though...might have done it differently if there were tons of people crapping everywhere!
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Old 02-03-2013, 12:14 PM   #16
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If you happen to be floating in fresh water, you can certainly use a desalinator (watermaker) to make safe drinking water. Some manufacturers of RO watermakers caution against cranking the pressure up too high when doing this. I am guessing that the flow of product water gets too high and damages the membrane. Anyone?
There are different membranes for different types of water; the under the counter sink type run at ~50 psi, brackish water ~100-225 psi and salt water membranes run at 800-900 psi. Each application has specific membrane and operating pressures. You can google Dow/Filmteck membranes if you want more info.

If we take on water, everything gets filtered (particulate and carbon) before it goes into the tanks.
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Old 02-03-2013, 02:58 PM   #17
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Interesting .... in many countries Clorox comes with water purification instructions printed on the bottle. Won't get the lead out tho...

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Old 02-03-2013, 04:36 PM   #18
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I've found, however, that many guests would die of thirst before they lowered themselves to drinking tap water. Honestly, I think it's more a fashion statement than anything. So I always stock individual-sized, name-brand bottled water so I don't end up with dehydrated crew.
They'll get pretty thirsty on my boat (or my bus for that matter). I started life on a well & mother boiled our drinking water. It was a big deal when the town put in treated water. I suppose I could carry a few Evian bottles and refill them from the tap but I like to think that my friends are smarter than that. If they get thirsty enough they'll drink tap water.
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Old 02-03-2013, 04:55 PM   #19
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Are you talking about a low pressure RO unit to clean your fresh water like they sell for household use or a high pressure RO unit to make fresh from salt?
I was thinking of a low presure ro from the water tank to the kitchen sink.
The high presure system would be nice but they are so expensive.
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Old 02-03-2013, 05:01 PM   #20
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We buy it in the store for all our cooking and drinking. Almost always have it.
I used to do that untill I installed a six stage ro system in my California home and the water is the best that i have ever drank. i would love to have water of this quality on board. When we tested bottled water at the request of the attorney general years ago we found bottled water that was like untreated city tape water. We found companies that were simply filling the bottles with tap water and selling it as spring water. Can't remember the yeaqr but that project gave me the incentive to go the ro route instead of bottled.
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