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Old 07-05-2022, 09:35 PM   #1
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Adding additional fresh water tank.

Heys folks.
I have a 2nd fresh water tank I want to connect to the existing tank.
There is room under the bed where the original tank is. I'm thinking this is the way to do it. I'm not concerned about too much water for the holding tanks because this additional water will be used for a small sitting pool when we go to music festivals. It will not end up in the holding tank.
Does this look right to you plumbing types.
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Old 07-06-2022, 12:29 AM   #2
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I imagine your two interconnection hoses will require one located as close to the bottom of the tank as possible, and one as close to the top for venting purposes.

Maybe that is what you had drawn.....just making sure I understood correctly.
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Old 07-06-2022, 01:13 PM   #3
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Exactly. Do you thinks hoses or pvc ?
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Old 07-06-2022, 03:47 PM   #4
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Your diagram will work . Instead of connecting a large hose to the top of the tank , you could just add a vent/overflow to the top of the tank. Depending on the size of the tank, the extra weight may be a concern.
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Old 07-06-2022, 05:51 PM   #5
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Be careful water is VERY heavy and a lot of Class C's are close to their cargo weight carrying capacity as delivered from the factory.
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Old 07-06-2022, 08:50 PM   #6
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Most class C units have the freshwater tank and bed in the rear. Remember that water adds 8.33 LB/GAL weight at the rear of the RV. Larger class Cs are already crowding the weight limits and you may overload the rear axle. It will also lighten the front axle which will lead to handling and steering problems.

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