Aluminum Water Tanks

[Doug]

Our 97 32+2 CB has 2 aluminum water tanks that are aproximately 50 gallons each. I am trying to get the water tanks clean enough that the water is drinkable. I have installed an activated charcoal filter, but the water coming from these tanks still has a "grey" color and a foul smell. With the other boats I have owned, I have installed this type filter, and whenever I fill the tanks, I put in about a table spoon of clorox. The activated charcoal filter takes the clorine taste out. The other tanks have all been plastic.

I have heard 2 different theories about aluminum tanks. One is to install an inspection deck plate in each tank and clean the tank thoroughly, using vinegar to disolve any calcium buildup inside the tank. The other theory is to leave the calcum buildup in the tank, as that is a better lining than aluminum. I am considering cutting holes in the top of each tank and cleaning them, but would like other's advice prior to doing so.

Thanks,
Doug

[jcollins]

Here is one opinion http://www.searoom.com/fresh_water.htm

Another http://powerandmotoryacht.com/columns/m ... qa/0904qa/

This article is interesting http://cruisenews.net/cgi-bin/dockside/ ... /read/1046

I would try the chlorine route before cutting holes in the tanks. But, I am no expert.

My two cents

[Pitou]

Doug I hope this helps. Great links John.

Straight from the Gorton's Fisherman:

Hi Kevin,
Thanks again for taking JP and I out yesterday, we had a great time and I love your boat!

I was looking at our sanitizing solution in the lab and we use a 200ppm Clorox solution which is equivalent to 1 Tablespoon per one gallon of water.

Food contact surfaces are approved at 100-200ppm, this lower end should not cause any corrosive damage to the water system either. A 200ppm Clorox solution lower end should be effective to sanitize your fresh water tank. If you ever want to check the water after you sanitize it for residual levels of chlorine, I can bring some test strips down to the boat and we can do a quick test!

If you want to disinfect the holding tank system I would recommend you use a 2400ppm solution, which is equivalent to 2/3cup per one gallon of water.

Hope this saves you a web search and is helpful!
Talk to you later,
Allison


Allison Williamson
Gorton's
QA Associate Mgr.