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Old 03-25-2008, 05:48 PM   #1
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How Much Water

How much water are ya'll carrying and what are your gray and black water capacities?
I'm figuring on 40 gal gray and 40 gal black... Anyone have any real world experience with this subject field?
We're not planning an doing too much dry camping, but I'm sure we'll come across the opportunity sometime.
Potable water holding tank I figure 2 or 3 X 30-40 gal tanks... If this is overkill, I'd appreciate most everyone's views on this...
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Old 03-25-2008, 08:08 PM   #2
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Re: How Much Water

I have absolutely no experience with this subject, but we have installed a 75 gal. water tank and a 95 gal.(only because I couldn't find a 75 that would fit) gray/black water tank. We hope and plan to do a fair amount of dry camping.
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Old 03-25-2008, 10:04 PM   #3
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Re: How Much Water

I'm going to use 95 gallon tanks from http://www.plastic-mart.com. Each tank is about $160, and they make them in all sorts of shapes and dimensions. They have one that will easily fit underneath the sides of my bus. I'll have a tank on each side. When you order your tanks from Plastic Mart, they send you a full size plan for the tank you want. You then choose which fittings you want installed and where, and send the plans back to them. They make it and send it to you. The have a place in California, and a new place in Texas. I called recently and asked about shipping. Both tanks shipped from California to Oklahoma City would run me $90. That's about $410 total for two tanks and shipping. Not a bad deal.

Also, I had a 35 gallon tank in my old travel trailer. If it was just my wife and I dry camping, and we brought our own drinking water and disposable dinnerware (no washing), we could make the water last for almost two days. That was a couple of 3 minute showers per person and flushing the toilet! Pretty much ALL of my camping is dry camping. So, I can tell you, that 40 gallons is pushing it. You'll need to plan accordingly. But if you can, and you plan on dry camping occasionally, get bigger tanks!
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Old 03-26-2008, 02:57 AM   #4
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Re: How Much Water

Quote:
Originally Posted by KC10Chief
Also, I had a 35 gallon tank in my old travel trailer. If it was just my wife and I dry camping, and we brought our own drinking water and disposable dinnerware (no washing), we could make the water last for almost two days. That was a couple of 3 minute showers per person and flushing the toilet! Pretty much ALL of my camping is dry camping. So, I can tell you, that 40 gallons is pushing it. You'll need to plan accordingly. But if you can, and you plan on dry camping occasionally, get bigger tanks!
So 95 gal water will last you about six days then.... 95 gal is about 380 lbs.... You planning to mix your gray & black, or are you figuring on keeping them apart?
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Old 03-26-2008, 09:26 AM   #5
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Re: How Much Water

Your black doesn't have to be near as large as your gray. I have an 18 gallon black, 38 gallon gray and 55 gallon fresh. It works out pretty well with those numbers. Sometimes you can run your gray onto the ground but I think you had better plan on holding all you can just in case. We have never filled up the black tank completely but have filled up the gray. Usually we (2 people) can get 7-8 days out of this combo being very careful of our use. Now that's being gone during the day with evening and night time bathroom calls, morning showers and bathroom calls, no dish washing or cooking. sportyrick
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Old 03-26-2008, 02:56 PM   #6
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Re: How Much Water

Quote:
Originally Posted by jimmyaustintx
I think 95 gals is 760lbs since I think water is about 8 lbs per gal.
OOPS... My bad... "A pint's a pound the world around".....
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Old 03-26-2008, 07:03 PM   #7
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Re: How Much Water

I'm not sure but my fresh water is around 20 gallons I think. Could be more or less.
My black water set up is about 9 gallons. My gray water is maybe 7 gallons. I wanted bigger ones but again I couldn't find the type of tank I wanted to fit the area.

The fresh water tank I had out of a travel trailer. And I have that tightly mounted under the driver seat or well under the heater core by the driver seat.
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Old 03-26-2008, 11:30 PM   #8
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Re: How Much Water

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Originally Posted by wmah
My black water set up is about 9 gallons. My gray water is maybe 7 gallons.
To me, I'd imagine there would be more gray to black water.... Well, I guess it depends on how much beer and how many burritos you do...
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Old 03-27-2008, 08:21 PM   #9
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Re: How Much Water

It would make sense for the gray to be bigger. My tanks are the same size. The difference is I have a little more pipe coming from my black water tank since my toilet is in the center of the bus. Besides I have no problem letting a little soapy water on the ground and with the way my shower drains into the gray tank which is just a hole with the shower pipe going into it, it overflows through the hole onto the ground. This is also my vent pipe on the gray water. Yes I did vent the black tank up and over to where my last window used to be on the driver side using a air duct vent connected to the black pipe using a 2" to 2" rubber connector. I didn't want to go to the roof, too much hassle for where the pipes came up.
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Old 03-27-2008, 09:28 PM   #10
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Re: How Much Water

Having owned a couple of RV's already, and currently building my own I do know a little on this subject. First of all, the black tank does not need to be as big as the gray tank, you'll use a lot more water for gray purposes (dishes, showers, etc) than you ever will down the toilet. Be that as it may, I used a pair of 36 gallone gray & black tanks that I bought HERE for $45 each. My water tank is a bit larger at around 60 gallons.

Now, I will never - ever fill that black tank as such, so I'm going to add a transfer pump so I can pump gray water into the black tank, thus expanding my gray water capacity...and by doing this, I'll add enough water to the black tank that it'll have plenty in there to help flush out the solids when times comes to do the dump....
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