Black Tank Capacity

[jbwillingham]

Anyone know the black water tank capacity for a 1971 25' Tradewind Twin? I am guessing somewhere between 10 and 15 gallons but can't find it anywhere in the materials I have.

Thanks.

[dbj216]

The black tank on my 66 Trade Wind twin bed was a small son of a gun. 10 gal would be pushing it. It was actually pretty well designed in my view, and had a nice foam pad to sit on. It was under a rusted out galvanized pan under the rear of the trailer. But the dump valve and connection point was not at all convenient unless you are fertilizing a farm field.

Here is a photo of a gray plastic black tank. Hope this helps.

David

[jbwillingham]

Wow, that's completely different from my set up. A lot must have changed in those 5 years. My tank sits on top of the deck and the low profile toilet sits on top of that. It's rounded in the back and looks like a quarter circle.


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[idroba]

Most of them were about 12 gal. Can you fill yours with measured gal water jugs to find out, or does it leak?

[jbwillingham]

12 sounds about right. My tank doesn't leak and your idea of measuring the water that goes in is the next step if I don't get an answer on here.


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[dbj216]

Oops! I wasn't thinking. Senior moment. Airstreams changed significantly in 69. My son's 69 Globetrotter has an above floor black tank in his "wet bath."

David

[msmcv51]

On the Airstream.com web site it states that the holding tank is approximately one week in size. What a way to state a size.

[jbwillingham]

I beg to differ on the "one week" size but I think since I have converted the AS to accommodate 2 adults and 4 kids I am beyond what they had in mind when they designed the black water tank. I think we were getting 2-3 days...