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Old 07-18-2021, 11:12 AM   #21
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City: Vero Beach
Vessel Name: Claret
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Originally Posted by JDCAVE View Post
There was an earlier thread on this so search around. Iím on limited 3G so really canít search. The Head Mistress has some good advice on this topic. I used 4 gallons of bleach to 350 gallons of tankage for 4 hours. Thatís on the strong side. You need to run it through all the taps but not the hot water tank. Remove the diffusers from the faucets. Then of course you need to fully drain the tanks and fill and run that water out. It takes me the better part of a day to complete the task.

If you do this once a year and have carbon filters on the system, you will find the water is as good or better than bottled.

But search for that thread. Lots of info.


How big is your boat if your fresh water tank is 350 gallons?
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Old 07-18-2021, 02:17 PM   #22
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City: Adelaide
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Everyone has there own thoughts on this topic.
I just use fill my tanks with Adelaide tap water then use it for showers, washing and drinking. I try to use up each tank completely every month at least, before refilling.
No filters, bleaches or other treatment. If I want bottled water I fill a bottle from the tap and put it in the fridge. It tastes great. No reason to complicate it unless you a filling with bad tap water.
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Old 07-18-2021, 02:34 PM   #23
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City: Vancouver Rowing Club, Coal Harbour, Vancouver, B.C.
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Having an old uncleanable fiberglass tank

When I bought my 1981 Marine Trader in 2007 its main water tank was a fiberglass holding tank that was under the queen bed in the aft cabin of about 250 gallons. It was also insulated with foam insulation. There was no way to clean it. It is used only for washing and showering. We bring bottled water for drinking. Lately it has been very difficult to find fresh water in the Gulf Islands. Some marinas are shutting off their water taps or having one tap only and restricting water usage.

Now that I am fully retired I am thinking of installing a dedicated drinking water day tank directly under the kitchen sink of about 60 liters made of polypropylene. There would be a deck fill using a standard water fill plate, a pull out spray nozzle right by the sink and it could drain into the bilge during cold weather if I am away from the boat in the winter.

The expensive part would be buying a portable Rainmaker osmosis water maker so I would be fully independent.

Do any of you guys have a separate day tank for drinking water?
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Old 07-18-2021, 03:40 PM   #24
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City: Corpus Christi
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Originally Posted by grahamdouglass View Post

Do any of you guys have a separate day tank for drinking water?

Yes, I do. 45 gallon with separate fill and filtration.
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Old 07-21-2021, 07:59 PM   #25
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Note: You can buy a Zero Water pitcher type filter for drinking water, coffee tea ect. Cost about $25. It really does produce 0 ppm water. No need to carry bottled water and no need to worry about "tank taste". It comes with a tester. When water gets to 5ppm replace filter.
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clean, fresh, freshwater, water

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