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Old 08-22-2014, 09:19 PM   #21
gwkiwi's Avatar
City: Juno Beach, FL
Country: USA
Vessel Name: Takes Two
Vessel Model: Defever 49 RPH
Join Date: Jul 2011
Posts: 500
We carry 400 gallons and it lasts two of us several weeks depending on anchoring as we use our fresh water outside faucet to rinse of the rode and anchor, I know I should install a separate raw water wash.

We do not run a fresh water hose to the boat when at the dock preferring just to use our internal tanks.

Currently I close off our starboard tank and just draw off of port to help with ballast especially since we topped up adding 1900 lbs of fuel yesterday at a great price and also to help weigh us down in order to get under the 19' bridge just outside Chicago.

Takes Two
Currently in Holland MI

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Old 08-22-2014, 09:32 PM   #22
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City: Ft Lauderdale
Country: USA
Vessel Model: 120' Custom, Cat 3512's, 1750 HP ea.
Join Date: Nov 2013
Posts: 82
Granted, I work on larger motor yachts for a living, so my numbers are not quite equal to cruising on a smaller vessel, but in 30 yrs of professional boating my long term, full time average is 100 to 125 gal/person/day. But this includes everything, laundry, washdowns etc etc. When I design my water systems I plan on water maker capacity to be 3 to 4 times max daily usage, ie 15 person capacity/1500+ daily usage/4500-6000 gal/day watermaker capacity.

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Old 08-23-2014, 12:48 AM   #23
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Join Date: Oct 2011
Posts: 5,864
I can be as mean with water as a cat covering its own s#*t. Admiral is convinced the boat is direct plumbed to Warragamba Dam, a huge dam W of Sydney, capacity of 4 sydarbs (ie 4 times the size of Sydney Harbor). It balances out.
Island Gypsy 36 Europa "Doriana"
Sydney Australia
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Old 08-23-2014, 09:55 AM   #24
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City: West Coast
Country: USA
Join Date: Apr 2014
Posts: 637
My family of five (including 3 teenage girls) uses about 200 gal/day when no effort is made to conserve. Our 1,200 gal/day (rated) easily keeps up. When we can't use the water maker (anchored or moored in a harbor), we can skinny down to about 100 gal/day.

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