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Old 12-10-2011, 04:29   #16
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Re: Diesel in the Water Tank !

Greetings and welcome aboard the CF, Shazam.
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Old 12-10-2011, 10:20   #17
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Re: Diesel in the Water Tank !

Ok, here is what worked for me. Bought some Bio-Bilge from a chemical company here in Kemah. It is designed for cleaning bilges. It claims to be non-toxic and environmentally safe, but I called the chemist and spoke with him. When I asked if it was safe to use his product in a water tank, he asked, " Got some diesel in your water tank did you?" I said yes, and he told me he has had many people use his product to emulsify the diesel in a water tank. He said to drain the tank and take the water to an oil recycle station. Put 7oz of the Bio-Bilge in the tank and fill it with fresh water. Slosh it around as much as possible. Drain again and re-fill with fresh water. Repeat until all traces of the Bio-Bilge are gone (it tastes a bit soapy). For me that was 4 flushes. Now there is no hint of diesel smell in the water and the water actually tastes better than my untreated starboard tank. I am a satisfied customer.
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Old 12-10-2011, 10:39   #18
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Re: Diesel in the Water Tank !

warm/hot water with Joy or other dishwashing detergent, take the boat out in choppy water so it will slosh around well. Drain the tank and multi flush. May need a second go around.

If I were building a boat I would probably put the diesel fill and vent in the cockpit, I hate dealing with fuel on the side of the boat and in the water... at least in the cockpit I can contain it well.
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Old 14-12-2012, 09:35   #19
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Re: Diesel in the Water Tank !

can you do heating on the tank to remove remaining water?
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Old 14-12-2012, 10:02   #20
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Re: Diesel in the Water Tank !

Of course. Water evaporates when heated. Just be patient to make sure it all gets out.
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Old 11-01-2015, 07:33   #21
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Re: Diesel in the Water Tank !

Has anyone converted a standard polyethylene fresh water tank into a fuel tank? I know that cross-linked polyethylene tanks are used as replacement fuel tanks in trucks. Assuming you replaced the hoses with fuel line, do you think this would work. Any issues/problems?
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Old 11-01-2015, 07:57   #22
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Re: Diesel in the Water Tank !

Quote:
Originally Posted by Cheechako View Post
warm/hot water with Joy or other dishwashing detergent, take the boat out in choppy water so it will slosh around well. Drain the tank and multi flush. May need a second go around.

If I were building a boat I would probably put the diesel fill and vent in the cockpit, I hate dealing with fuel on the side of the boat and in the water... at least in the cockpit I can contain it well.
It is a good location in most sailing. In our Tartan 44 the vent was in the cockpit and on a very rough sail in the SP the cockpit was filled 3 times. Had quite the engine bill when it was all over.
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Old 11-01-2015, 08:33   #23
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Re: Diesel in the Water Tank !

Certainly, PE tanks have been used as fuel tanks for years on cars and trucks. The first problem that I would see would be that the tank would have to be well padded and strapped down very well so that it doesn't wear through anywhere. The other problem, I suspect, is that over time the diesel will saturate the PE and you will have a slight diesel odor coming through the tank wall.

The good thing about PE, compared with the price of a stainless tank, you could replace it at any hint of a problem.
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Old 11-01-2015, 08:45   #24
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Re: Diesel in the Water Tank !

I don't know why, but almost all water tanks I have ever seen were a translucent sort of white see through, but all fuel tanks I've seen are black. On some types of plastics color changes the properties, does it here?


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