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Old 19-08-2008, 08:06   #1
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How to get chemical taste out of new black water tanks.

We are getting ready to leave Capetown with a new Admiral 40 sailing cat. The potable water from the tanks has a VERY strong chemical taste. Any ideas on treatment to get rid of or at least reduce this taste?
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Old 19-08-2008, 08:22   #2
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vitamin dissolving tablets?
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Old 19-08-2008, 22:51   #3
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some bleach, rinse, then a bunch of baking sode dumped in thru the inspection port fill let sit then drain and rinse.

or a britta filter for drinking water
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Old 20-08-2008, 02:51   #4
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Dont Black Water tanks have No1 and No2's in them?

I dont think I'd drink from them and I have no doubt the taste would be shitty

(Oh, I see, they are new and they are black)

Dave
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Old 20-08-2008, 07:39   #5
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Uncured Tank Coating?

I would suggest you check with the maker to see what they lined the tanks with. In the past, iron tanks used to be coated with a thin morter. Now some builder's seem to put a two part coating on the inside of water tanks and it soulds like yours may have been so treated but the coating hasn't kicked off properly. If so and if the water you're adding to the tanks has chlorine in it, the coating may never cure properly. I sure as heck wouldn't settle for tanks that fouled the water.

s/v HyLyte
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Old 20-08-2008, 15:10   #6
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We had the same problem - in our case with a food certified grade of epoxy lining steel tanks. It was very strong and even using the water for showering one came out smelling like Chemical Ali.

The paint manufacturer, who supplies a lot of food grade epoxies to the food processing industry, was at a loss as to why it had occured and suggested mainly just flushing but to try baking soda, and claimed the taste would disappear.

In our case baking soda (and they suggested some other household thing as well which I have forgotten now) didn't make any difference but as the manufacturer said it would the taste and smell soon disappeared with flushing. I just filled the tanks, let it sit a day or so and pumped it out, repeating for about a week or so I think it took.

I assume that your tanks are frp so your experience may differ.
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Old 20-08-2008, 17:03   #7
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Thanks

Thanks for all the help. Maybe we'll try all of the above!

Crew of SV Options
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Old 20-08-2008, 17:28   #8
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First, are you certain your tank is intended for potable water? The only thing I can think of that already has not been mentioned is to keep cycling the water in the tank. Eventually it should go away if the tank was intended for potable water.
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Old 21-08-2008, 00:39   #9
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Quote:
Originally Posted by cat man do View Post
Dont Black Water tanks have No1 and No2's in them?

I dont think I'd drink from them and I have no doubt the taste would be shitty

(Oh, I see, they are new and they are black)

Dave
That was my first impression as well.
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Old 21-08-2008, 20:44   #10
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Who made the tank?

I have never seen a Black Plastic Water Tank

Fuel...Yes

BTW I don't DRINK anybody's boat water....even my own

As a pain in the keester it is I only drink bottled water
or water from gallon jugs......Boat water is last resort

My innards thank me for it
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Old 21-08-2008, 20:53   #11
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Black food grade polyethylene tanks are super common for potable water storage. They are pigmented black to inhibit light induced growth of organisms in the water.
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Old 21-08-2008, 21:03   #12
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Here in the States

about all we see are white Todd tanks.

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Black food grade polyethylene tanks are super common for potable water storage. They are pigmented black to inhibit light induced growth of organisms in the water.
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Old 21-08-2008, 23:40   #13
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Black tanks????

Who is the manufacture?

For potable water, I've only seen white, green and blue tanks over the years.

http://www.ronco-plastics.net/

http://www.incaplastics.com/rvtanks.htm

http://www.dura-weld.com/tanks_marine.htm
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Old 22-08-2008, 03:36   #14
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Who is the manufacture?

For potable water, I've only seen white, green and blue tanks over the years.

http://www.ronco-plastics.net/

http://www.incaplastics.com/rvtanks.htm

http://www.dura-weld.com/tanks_marine.htm
Ronco, who you link to, do all their water tanks in black if wanted - have a look in their catalogue.

A quick google gives an endless list of USA manufacturers of tanks in black polyethylene for potable water.
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Old 22-08-2008, 08:28   #15
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I suspect we normally use the white translucent poly tanks in the US, because it is easier to inspect them. Any type of mold or growth on a black surface would be hard to see--but on a white one, it stands right out.

db, you can add an activated charcoal (carbon) water filter at the tap and that should go a long way to removing the chemical content and flavor. Some screw right into the faucet tap, others install in the plumbing line, and of course you can use a "Britta" or similar brand pitcher with the carbon filter in it--no installation required.[g]
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