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Old 05-06-2016, 07:59 AM   #1
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1957 22' Custom
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Want to add new black and gray tanks

I'm about to pull the shell off of a '57 22' Custom and I want to add new black and gray tanks. The bathroom and the kitchen will be street side, and from back to front I'd like to put in a gray tank for the lavatory and shower, a black tank for the toilet, and another gray tank for the kitchen. I'd like to keep the tanks inside the belly skin, but I'm uncertain how to plumb the drains from the tanks. Any suggestions or expertise is greatly appreciated.
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Old 05-07-2016, 10:53 AM   #2
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We added Grey & Black tanks several years ago during the restoration of our '56 Safari. I semi-documented it amongst the posts in my restoration thread, starting around post #138. Let me know if you want any greater detail on how we did it - even though your layout is different in a 22' Custom, the theory & process is still the same.

A lot of work - but they work like a charm! Makes the trailer much more useable for boondocking.

Shari
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Old 05-07-2016, 11:36 AM   #3
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Originally Posted by DDickey View Post
I'm about to pull the shell off of a '57 22' Custom and I want to add new black and gray tanks. The bathroom and the kitchen will be street side, and from back to front I'd like to put in a gray tank for the lavatory and shower, a black tank for the toilet, and another gray tank for the kitchen. I'd like to keep the tanks inside the belly skin, but I'm uncertain how to plumb the drains from the tanks. Any suggestions or expertise is greatly appreciated.
The first major step is to measure the area where you plan on installing the tanks.

That will guide you as to what you can and cannot do.

Also, what size tanks you install is a function also of "where" will they be located in the trailer, so that you will know the weight and balance effects the contents of those tank create.

Lastly, 231 cubic inches equals one gallon of water. You can calculate the capacity of the tanks you choose to install, as an example a tank that has dimensions of 48 inches long by 24 inches deep and 5 inches in height equals 5760 cubic inches. Divide that by 231 and you would have a tank that would hold 25 gallons, but subtract a little because of the thickness of the tank.

Following the above should save you a lot of grief and or oh oh's.

Andy
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Old 05-25-2016, 10:47 AM   #4
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How do you support plumbing underneath

So I've got the tanks picked out but now I'm wondering how you support the plumbing underneath the trailer? I'll have three tanks, one black and two gray, and the drain for each tank will exit from the bottom of the tank and immediately below the belly pan. I'll keep the pipe as tight to the pan as possible, but there will probably be a few inches between the belly pan and the pipe. How do you support the pipe and make it look good?
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Old 05-25-2016, 11:27 AM   #5
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We added Grey & Black tanks several years ago during the restoration of our '56 Safari. I semi-documented it amongst the posts in my restoration thread, starting around post #138. Let me know if you want any greater detail on how we did it - even though your layout is different in a 22' Custom, the theory & process is still the same.

A lot of work - but they work like a charm! Makes the trailer much more useable for boondocking.

Shari
Would you add a link to it please?
Thanks
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Old 05-26-2016, 03:02 PM   #6
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Would you add a link to it please?
Thanks
Our tank retrofit starts around post #122 and picks up again in post #142, with additional pics shown in post #156 and post #171. Finishing out the bathroom starts around post #343.

Shari
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Old 05-27-2016, 09:49 PM   #7
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Thank you!
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