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Old 02-03-2012, 08:28 PM   #1
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"Black tank" contribution?

How much sewer contribution per person do you budget?

We're just beginning full timing with a combination of dry camping and with hook ups.

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Old 02-03-2012, 08:49 PM   #2
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Gee, I never thought about budgeting "that". There are so many variables to consider. I just check the panel and start thinking about it when it shows my tank 2/3 full while parked. When traveling I like to drive with empty tanks so I dump before heading out. I have an ipad app that helps locate dumps, but there are also websites that list them.

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Old 02-03-2012, 09:34 PM   #3
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Man, you don't budget for it?? LOL

After earlier this week, I don't trust my guages..
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Old 02-03-2012, 10:17 PM   #4
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Budget per person for the black water tank. Never really thought of it that way. If you go over budget on the black do you just stop eating and drinking? Sorry, just couldn't resist.

All kidding aside the wife and I boon-docked for 10 day's last summer and the black tank (45 gal) registered 1/2 full. Our gray water (45 gal) registered 3/4 full. Our 66 gal freshwater tank registered empty after 10 day's, After leaving our friends property we stopped at a local campground, dumped the tanks and filled up with fresh water.

If your tanks are comparable in capacity and you go into fresh water conservation mode you should be able to make it at least 10 day's. If your tanks are bigger then you should be able to go longer. The tank you will fill the fastest is your gray water.

Hope this helps
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Old 02-04-2012, 05:42 AM   #5
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I'm pretty certain this constitutes the first time in my life I have seen the word budget used in this context. I need to get out more.
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Old 02-04-2012, 07:16 AM   #6
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It's a pretty good question actually and I too have never thought of it this way. We don't dry camp and our grey tank ALWAYS fills much faster than the black so that is our gating item.

In the summer, we spend a month in Minnesota at my FIL's place w/no sewer hook ups. Our 57 gallon black tank will require dumping after about two weeks but we make no attempt to minimize the amount of water we put in it... plus I like adding almost 1/4 tank of fresh water to the black tank after flushing it.

Good luck.

Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.

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Old 02-04-2012, 08:01 AM   #7
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I am guessing someone that is good at spreadsheets could figure this out for you.

Average tird size + average urine discharge per day + amount of water to flush times amount of people divided by tank size would give you the number of days til tank is full. Maybe add 10 percent margin for error.
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Old 02-04-2012, 08:04 AM   #8
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I guess it kinda depends on how big your tank is and how much you eat.
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Old 02-04-2012, 09:26 AM   #9
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We budget 1 number 1 and one number 2 per person per day. Anything more than that we use the facilities where we are camped. Sometimes that presents a problem if the WallyMart isn't a 24 hour one.
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Old 02-04-2012, 10:32 AM   #10
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Depends... On how bad a case of "Montezuma's Revenge" the person has.

Also on if they are diabetic (Means "Water flows easily in english, in short, urinates frequently) and a few other medical conditions, all of which add up to greater use.
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Old 02-04-2012, 10:41 AM   #11
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Depends on if the DW is cooking or we go out to eat. (I'll be on the couch tonight).

The grey tank fills first and that's our dump factor. I wish I could pump some grey water into the black at times, but I don't plan to make new holes in the tanks for that.
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Old 02-04-2012, 11:12 AM   #12
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The two of us add about 3 1/2 gallons per day to the black tank - total not each. We use a fair amount of water when we flush. We add water to the bowl, flush, add more water, brush and flush again.
Clay WA5NMR - Ex Snowbird - 1 year, Ex Full timer for 11 years - 2004 Winnebago Sightseer 35N Workhorse chassis. Honda Accord toad.
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Old 02-04-2012, 06:15 PM   #13
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Remember the Fiber Factor...

Originally Posted by bmrzmrs View Post
Man, you don't budget for it?? LOL
What multiplier does everyone use, for excessive fiber intake
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Old 02-04-2012, 06:45 PM   #14
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One person up-thread said something which is highly important.

The standard sensor is nothing more than a nail or screw Real high tech there, If it's wet then the level must be at least that high right.. Wrong, if a moist "Slime" covers the sensor wall.

Thus the Sensors are accurate only on the 1st use, after that,,, They tend to read different than truth.

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