Water Makers

MacInCt

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Please forgive the repeated post - I also put this question on the Engines, Electric, Plumbing board - does anyone have any tips for sizing a water maker?

Thanks,
 
quote:

Originally posted by MacInCt

Please forgive the repeated post - I also put this question on the Engines, Electric, Plumbing board - does anyone have any tips for sizing a water maker?






I know the US Navy uses a factor of 100 gallons per person per day. That is inclusive of cooking, laundry, ice, water, bathing, etc...

Of course those big gray things with numbers on the P&S bow are floating cities deploying for months at a time.
 
100 gallons a day? wow... even my girl friend can't use all that! :-)

when i'm alone on the boat, I get 7 days of the 250 gal tanks, inlcluding laundry.

i replied in the other thread...
 
On charter with 10 guests that have no idea of the cost of water and 4 crew we use about 350 gals a day.
 
Thanks for the replies. The boat is going to be on a mooring pretty much full time this summer with at least two people living on board with the expectation that the numbers will go up to 6 or 8 every weekend. The boat has a 150 gallon water tank. Oh, and did I mention that most of these people will be feckless teenagers? Hauling water to the boat or taking the boat in to the town dock every day or two isn't very feasible. Hence the necessity of a water maker.

Bazza, if my math is right your charters use about 25 gallons a day per person. That sure sounds more doable than the Navy's 100 gallons a day!

Thanks, now I have a pretty good idea of what size I need.

All the best,
 
I would figure out how much you will run your engine and match your gal per hour with that. If you want 50 gal a day and you charge for two hours a day you hill need something that produce 25 gal an hour. Also, if you dont run the watermaker every few days you will have to pickel it or fresh water flush. You will also need to constantly check your prefilters. Oil, chlorine and gunk in water is BAD for a watermaker. lots of junk in a bay, but it can be done. You can get automatic ones that flush when needed.

Buy the way, How big is your holding tank. If its not a match to your water tank, you will have to go to a pump out station anyway. So just fill up then. I know you wont discharge all that waste at your mooring. Would you? Water makers are nice, But you do have to pump out, no mater how much water you have. Please keep clean wake.
 
i think water capacity is 350 USG not 150... holding is listed as 150 which should be good for at least two weeks with vacuflushes.

as i mentioned in the other thread, the key to size a WM is how you're going to power it. In this case, I think you need to plan on 4 hours of genny to recharge batteries so 600GPD will make about 100USG in 4 hours which should be just fine. ...unless the price difference with an 800GPD model makes it more attractive.
 
Pascal, the price difference is actually pretty small.

Badsanta, the new Sea Recovery "AquaMatic" units are pretty idiot proof. They do an automataic fresh water flush after every use and every seven days regardless of use. The boat will be in Nantucket Harbor in some of the cleanest sea water in the northeast. And there is a free (tips appreciated) pump out boat to encourage people to keep the water clean.
 
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