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Old 08-17-2014, 06:05 PM   #1
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Black water tank has 2 valves?

Can anyone tell me why the black water tank on my forest river 392 fktb has two valves for the black water? One is right behind the axles and the other is at the discharge pipe where they normally are.

Thanks!
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Old 08-17-2014, 06:07 PM   #2
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If not new the previous owner may have installed it.


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Old 08-17-2014, 07:33 PM   #3
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Does it have 1 1/2 bathes? If so, it'll have a second black tank for the 1/2 bath.

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Old 08-17-2014, 07:50 PM   #4
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Thanks for the quick reply. It only has one bath. The second valve is in the same line as the one at the connector to the sewer.
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Old 08-17-2014, 08:07 PM   #5
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Just guessing. The original leaked and it was easier to install the second one....

Can you ask the past owner?
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Old 08-17-2014, 08:07 PM   #6
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Black water tank has 2 valves?

If it has 2 grey tanks the previous owner probably installed it. That's what I did. You leave the end valve closed and open the 2 grey tank valves and it combines the grey tanks.


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Old 08-17-2014, 08:07 PM   #7
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So I am guessing the previous owner installed the second valve?
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Old 08-18-2014, 08:09 AM   #8
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So I am guessing the previous owner installed the second valve?

That would be my guess.


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Old 08-18-2014, 09:11 AM   #9
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Do you have tank heaters? If yes, it is probably to keep the discharge line empty so it won't have to be heated also.
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Old 08-18-2014, 08:50 PM   #10
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I do not have tank heaters and I am not sure if the previous owner installed it, so I guess I just have two valves lol! I appreciate everyone's advice!
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