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Old 04-13-2012, 08:50 PM   #1
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Vanity drain

Hi everyone! I have a 2007 378 that I bought last fall and the bathroom sink drains into the black tank. Is this normal or should I modify the drain pipes?

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Old 04-13-2012, 08:59 PM   #2
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Just make sure you keep water in the "P" trap otherwise you will get a distinct odor that is very unpleasant.

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Old 04-13-2012, 09:29 PM   #3
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That doesn't sound right to me. Good question!
2012 Rockwood Windjammer 3008 W
2007 Tundra Reg Cab 4X4 SR5 5.7L
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Old 04-14-2012, 12:59 AM   #4
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In my opinion this is generally a good thing. Because the gray tank almost always fills up long before the black tank does. Also sometimes you can get clogs on the black tank drain because of all the dry matter and little water used when you flush the RV style toilets.

Making the bathroom sink drain into the black tank helps both of these issues. So it's a feature, and one I agree with.

I don't know which tank my sink drains into yet. So far I haven't figured it out.
2008 Georgetown SE 350DS BunkHouse
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Old 04-18-2012, 11:35 AM   #5
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We have a 2008 Georgetown 378 and I can assure you that our MH vanity sink does in fact drain into the bloack water tank. Also, you should be aware that the vent stack under the vanity is also connected to that tank.
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