Voltage 3605 2nd Gray tank - Dutchmen Owners
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Old 08-10-2017, 11:21 PM   #1
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Voltage 3605 2nd Gray tank

For all of you with 3605's do you know what drains into your rear Gray water tank ?
I was trying to figure it out and it seems nothing on mine drains into the rear tank I do have a gray water drain valve back there but nothing comes out of it I went through the whole trailer today shower bathroom sink kitchen sink rear bathroom sink and water drain all go into the front tank!!

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Old 08-11-2017, 02:07 AM   #2
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On mine the rear gray tank drains the kitchen and rear bath sinks and the washer in the garage. That's a bummer sounds like you'll have to pull the bottom cover down to check it out or take it back to the dealer.
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Old 08-11-2017, 02:10 AM   #3
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I will pull the underbelly myself don't like playing games with the dealer just wanted to see if anyone else experienced this problem

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Old 08-11-2017, 02:28 AM   #4
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That's what I would do too, good luck!
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Old 08-11-2017, 03:37 AM   #5
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Mine is for the rear bath sink and washer. My kitchen drains into my main bath. Which makes no sense. But owell lol
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Old 08-12-2017, 04:31 AM   #6
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My rear holding tank on 3905 has a cable remote operated valve. I had to cut and rip away the expanding foam insulation. It was binding up the operation of drain valve. I then sealed gap around grain pipe with gorilla tape.
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Old 08-13-2017, 04:53 AM   #7
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On my V3605 the tanks are,

Kitchen sink, front bathroom sink and shower all go to the front gray.
Only the back bathroom sink goes to the second gray tank.

Now, here is the kicker, the panel indicator on mine , says "Kitchen" for the back bathroom sink gray tank.

In small letters on the panel it says "tanks may be different depending on model".

When we purchased ours, at the walk through the dealer rep. told us the back bathroom sink and toilet shared the sam tank and the kitchen had it's own tank?. I know for a fact this is not true in my case. After tracking down the shotty warranty work the dealer did and fixing the leaking valve my self that the dealer didn't fix is how I know.

You could possible have a valve leaking into the drain as to why you do not see level on that tank.
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Old 08-25-2017, 04:00 PM   #8
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On my '15 3605

The rear grey tank is fed by the washer hookup only. Rear bathroom sink feeds into rear black with toilet.

Panel has the rear grey labeled as 'Kitchen' but nope.. Kitchen goes into front grey with main bathroom shower/sink.

Essentially, for now. my rear grey is useless to me.
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