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Old 09-16-2008, 01:15 PM   #11
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Originally Posted by adventureduo
Do you guys drop anything down the sink to keep the grey tank from stinking?
We closely monitor what we put into the sink drain and make an effort to drain the gray water often. The sink strainer also has the feature where it closes completely. I think that this also helps the odor issue.
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Old 09-16-2008, 05:29 PM   #12
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I should have updated this thread long ago....

We did not want to give up the space that the normal grey water tank would require in the galley cabinet under the sink.

Originally the plan was to just have the plumbing volume between the sink and the exterior drain valve.

After talking to SMB TX, they took up the challenge, and found a 2.5 gallon tank that looks like it was made to fit in the little spot forward of and above the passenger side rear wheel well. They applied some black paint and you don't even know it is there unless you are looking for it.

Thusfar it has worked perfectly. We have never filled it up.

So we ended up not sacrificing the interior space, and yet we do have some additional grey water storage.
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Old 09-16-2008, 11:57 PM   #13
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draining it is another matter..

it comes out awful slow on my rig, even with it opened fully...compared to how fast it gets pumped in there.
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Old 09-17-2008, 09:56 AM   #14
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So, let me get this right.. if we have the upgraded 20 gallon water tank we only have a 8 gallon grey tank? That doesn't make any sense at all.
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Old 09-17-2008, 09:58 AM   #15
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Our "semi-classic" (read "old") '93 has two gray-water tanks, due to how the original owner designed it. There's one 8-gallon unit on the passenger side for the sink. Like many of you, we are careful what we let get in there, so we have not had odor problems. We've got 16 gallons of fresh water, so if we're out for several days the sink tank fills up. Ours doesn't overflow out the vent - you know it's full when the sink won't drain. The second gray tank is on the driver's side and takes water from the shower. It's pretty small. Finally there's the black water tank under the marine toilet. Biggest problem with our old-fashioned setup is that both gray-water tanks are easy to drain, but the black-water hookup pretty much requires lying on the ground and reaching under to get to it. Happily the macerator we bought will just clear the stuff under the van, so at least pumping it out is easy. Anybody else got a three-tank setup like this? Did SMB combine the gray and black output pipes on yours? On ours they are separate - not sure why, since they are right next to each other.
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Old 09-17-2008, 02:23 PM   #16
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Originally Posted by adventureduo
So, let me get this right.. if we have the upgraded 20 gallon water tank we only have a 8 gallon grey tank? That doesn't make any sense at all.
My gray water tank was also matched to a smaller fresh water tank and I upgraded to a larger potable water tank just to be able to use the outside shower more. I actually don't put much down the drain. I think SMB figures you will drink or use some of the water rather than dump it into the sink. I don't drink from the fresh water tank or use it for cooking but I do use it to brush teeth, do some dish washing and wash myself up with it. When I ordered my van I asked about using the fresh water tank to drink from and was told most do. Being I can't clean the tank easy, I just bring bottle water from my home water so it would be possible to over fill the gray tank if I didn’t use the outside shower and did a lot of dish washing. I do the same as others have posted, that is most of the water in the gray tank is clean as a rule and I can dump the water in areas where there is no impact. I try to keep it empty…who wants to pack around any extra weight anyway.

As for the post about the tanks connected together, if the black water tank and gray water tanks were combined you could only dump at the correct sanitary station so it's probably something that you would have to request during the build.
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Old 09-17-2008, 02:24 PM   #17
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Adventure,

I don't think there is any correlation between the size of the grey water tank and the size of the fresh water tank.

We have 20 gallon fresh water tank and the 2.5 gallon grey water tank.

The best part is that we have yet to fill the 2.5 gallon tank. I think we must have come close once judging by the amount of water that came out when I opened the valve.

Given the number of places that the grey water tank can go, I think there are two seperate decisions to be made.
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Old 09-17-2008, 04:47 PM   #18
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Weird, i wonder what size we have then... cause we have emptied 3/4 of our 20 gallon tank with no water overflowing out of the wall.. nor the sink stop draining.

I emailed the PO.
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Old 09-17-2008, 05:45 PM   #19
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Quote:
Originally Posted by adventureduo
Weird, i wonder what size we have then... cause we have emptied 3/4 of our 20 gallon tank with no water overflowing out of the wall.. nor the sink stop draining.

I emailed the PO.
Adventureduo,

Have you verified that your gray water drain valve is in the closed position? Is it possible that it is open and you are draining all the time? I know that I have driven off while draining the (really clean) water out of the gray water holding tank and I have to remember to stop and close the valve and cap the drain. Just a thought.

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Old 09-17-2008, 05:58 PM   #20
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Blackeye, yeah i have. Cause i've drained it like 3 times since we bought it.
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