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Old 11-07-2007, 05:20 PM   #1
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Black Water/Gray Water

Hello all. I hope this is the right forum for my question. I am looking at buying an older 71 Overlander and the seller said that the toilet uses a containment tank and that all of the basins share the same waste outlet.
That is a little confusing to me. Isn't there two tanks in travel trailers, one gray and one black? When hooked up in an RV park don't they both go to the same sewer hookup? Thanks for clearing this up for me.
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Old 11-07-2007, 05:31 PM   #2
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Many of the older units only had a black water tank. Gray water was discharged on the ground. Today, owners with units without gray tanks connect to a "blue boy" which they drag over to the dump station when full.
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Old 11-07-2007, 05:45 PM   #3
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Oh, I see. Boy, that don't sound like fun.
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Old 11-07-2007, 07:58 PM   #4
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I have a 1973 that is in the remodeling stages. It did not have a grey water tank. The gray water and the outlet of the black water tank came to a single drain point. If I understand correctly when you are in a park that does have a full sewer hookup you can connect your single drain outlet into it. The use of the "blue boy" type of tank would be required if the park does not have a direct connect at the site. I have now idea how many parks do have a direct connect since I have not been able to take my rig on the road yet.

Also note that a number of people here in the forums have added a grey water tank to an older Airstream that did not have one originally. That will in fact be the approach that I will be taking when I get to that part of my remodel.

I hope this helps,

Malcolm
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Old 11-07-2007, 09:31 PM   #5
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Using a blue boy is not a big deal. It's just grey water and only in campgrounds without full hook-ups (State Parks, Nat'l Forrests, etc.). Most places we boondock allow us to run grey on the ground ~ or nobody is around to care.

Our '64 doesn't have a grey tank, we have used a blue boy. However, we are retrofitting one (actually two) grey tanks in our '56. But then our '56 didn't have black tanks either...they used 'golpher holes' back in the day. We're adding a black tank too.

Shari
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Old 11-07-2007, 09:50 PM   #6
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Hi TimeOut -- Welcome to the Forums! Gray tanks didn't get put into Airstreams until 1974. So black tanks are for black alone. Blue totes are the way to go for gray water.
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Old 11-07-2007, 10:13 PM   #7
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Poor gopher..........
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Old 11-07-2007, 10:16 PM   #8
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Airstreams no longer have Gray Water Tanks they have Wash Water. Seems like many towns will let you put wash water on the ground but not Gray water. The industry is trying to eliminate the term Gray Water and use Wash Water in its place as everyone knows what Wash Water is, but many think that Gray Water is a combining black and white to make gray.
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Old 11-07-2007, 10:47 PM   #9
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It should be said that you can use the "blue tote" for black water, too, should you be in a situation where you need to...boondocking, for instance and you run out of holding room...though I suspect most use them for grey water mostly.

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Old 11-08-2007, 09:24 AM   #10
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They are use regulary at rallys for both black water and wash water specially for those with out holding tanks.
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Old 11-08-2007, 09:35 AM   #11
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Of course blue totes can be used for black water...but I'd rather move the trailer to the dump and conserve so it doesn't get full. With our small 10 gallon balck tank, the two of us can 'go' 5+ days...then we move on to a new site with a dump in between.

Shari
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Old 11-09-2007, 12:46 AM   #12
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Hey thanks for the information everyone. I really appreciate it. The 71 got sold before I could get to it. I'm presently looking at a 78 model Land Yacht. Maybe I'll have better luck with it. Gotta move fast on those bargains.
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Old 11-09-2007, 12:55 AM   #13
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Timeout,
Good luck in your search, welcome to the forums.
Dave
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Old 10-18-2015, 08:00 AM   #14
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Hang in ther it took me many years before I found the right AS to restore for my wife (She loves the idea of owing an AS, but not the work it take to restore one) Where the converter and battery set (under a bed in the middle) there is the expsed drain pipe for the front sink and it is a great place to tap into the add a grey (loved thenew term wash water) tank between the frame rails and this is not hard to do if you have knowlege of revit removal and replacement for the belly pan. It is n hard to place a shut off on the shower line to force the water back to this tank. For me that leaves only the bathroom sink to worry about and I quess it will go into the sewer tank as manufactured. Some models let you drain the wash water into the park system while closing off the back water. I ha to rebuild the back water tank so if any one has suggestions on the best way for me to do this, Plwease let me know.
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