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Old 12-04-2015, 01:49 AM   #1
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Burning Man

Wife and I will be attending Burning Man next year and I have a major concern. We will be boondocking for 7-8 days and I want to keep the fridge going the whole time. It is a Norcold with the freezer on top. We will be taking the occasional shower, Navy style, and doing some food on the stove as well. My concern is the amount of propane we will need. I have two 5 gallon tanks mounted and the ability to take 2 more. How much do you think we will need? Thanks in advance.
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Old 12-04-2015, 03:58 AM   #2
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If you're not running heater, then four tanks should do it . Depends on temp, hot water use,etc. What are you doing about electricity? Occasional generator? If so, heat water and run fridge on electricity when running. Also consider your three water tank capacities.
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Old 12-04-2015, 11:05 AM   #3
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Which model fridge do you have? If you look in the specs it will tell you what the LP consumption is. Might have to convert from BTU's to pounds or gallons. Your water heater will be sucking it down too. What do you plan to do for electricity? You will need a constant 12 volt source to keep the fridge board powered up so it will run, even on LP. I would think that 4 tanks would be enough for a week on fridge. They are not a huge consumer. The furnace is the pig, then the water heater.

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Old 12-04-2015, 03:06 PM   #4
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Thanks for the info guys. I will be using a Champion 3100 watt inverter generator most days, for a few hours, to run AC and charge the battery. I am taking 15-20 gallons of stabilized gas for the generator. I would hope that my existing battery would run the fridge, and other small draws like the CO detector and smoke alarm for 24 hours between charges. Great suggestion for running the water heater off the generator, hadn't thought of that for some reason. Will take showers then. My understanding and observations have indicated that the fridge basically runs off of a "pilot" flame. Aaron, since you mentioned converting from BTU's to pounds or gallons, I found this example on the net https://answers.yahoo.com/question/i...0230954AAQ2HVg It seems a bit optimistic to me, however, if it is even reasonably accurate I am encouraged. It seems to say that a cylinder will last over 18 days for a 1000 BTU/hour pilot light. Even if off by 50% that would be 9 days which is excellent for 1 cylinder. I really don't anticipate using the furnace much, if at all. That's what fleece layers and blankets are for.
One more issue if you guys have the time. Since this event has porta potties we will be using them as much as we can and only using our toilet for night visits. Based on this it is obvious the the gray tank will fill much faster than the black tank. I can carry 35 gal. of fresh water and both the gray and black hold 35 gal each. Would there be a problem with transferring some of the gray water to the black tank if necessary? Any issues that this might cause?
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Old 12-04-2015, 04:55 PM   #5
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This past summer I was out for 9 days, didn't use an entire tank, mine are 7 gal. So I would think a week, and you have two tanks without running a heater you should be fine.
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Old 12-04-2015, 09:28 PM   #6
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Fridge board is low draw as is the LP detector. Watch out for things like amplifiers, stereos, sub-woofers, etc. Dutchmen has a bad habit of wiring them direct with no way to turn them off. The fridge is basically a pilot light sized flame and will not use much LP at all. Better check the amperage on you water heater to make the generator can handle it. Electric heating elements have a tendency to be power hogs. IF you don't have any excess draw on the battery you should be able to go a couple three days between charges. When I boon dock in non furnace weather I can get 3-4 days no problem on a Group 27. Will they have honey wagons making the rounds to pump tanks? Some events do. Thirty-five gallons of fresh water is going to require some careful planning so you don't use it all up. It is not a problem to transfer gray to black. I have done it before where there was a no dumping any water rule. I used a small hose adapter cover on the dump pipe, then just opened the gray to take off what I needed. If you use a bucket you can dump it into the black tank, 4-5 gallons at a time.

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Old 12-05-2015, 01:14 AM   #7
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I have seen a pretty neat device which taps into your gray tank, goes through a filter and it's own demand pump, and feeds the toilet flush. That way, you are not using fresh water to flush the toilet, and you are taking from the gray to go the black. As I recall, the device was about $200. Could be very useful.
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Old 12-05-2015, 02:42 PM   #8
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Quote:
Originally Posted by MartyG View Post
I have seen a pretty neat device which taps into your gray tank, goes through a filter and it's own demand pump, and feeds the toilet flush. That way, you are not using fresh water to flush the toilet, and you are taking from the gray to go the black. As I recall, the device was about $200. Could be very useful.
Have you got a link?

I'd like to see some more info on it.
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Old 12-05-2015, 03:13 PM   #9
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Have you got a link?

I'd like to see some more info on it.
It took me a while to find it, but here it is: Recycle RV Grey Water kit - Valve switch assembled

Notice that the kit DOES NOT include a second demand pump, you have to supply that. The kit looks complicated, because the three-way valve offers you the option of flushing with gray or fresh water. (Say when you're hooked up to city water). The other caution I would think of is drilling into the gray tank.

Good luck!
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Old 12-05-2015, 07:57 PM   #10
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Originally Posted by MartyG View Post
It took me a while to find it, but here it is: Recycle RV Grey Water kit - Valve switch assembled

Notice that the kit DOES NOT include a second demand pump, you have to supply that. The kit looks complicated, because the three-way valve offers you the option of flushing with gray or fresh water. (Say when you're hooked up to city water). The other caution I would think of is drilling into the gray tank.

Good luck!
That looks pretty overpriced and complicated. I would go with a bucket and the sewer cap.

It ain't rocket science. I am willing to bet you could hook a pump up to the grey and put a valve on the toilet line and call it good. A inline filter might not be a bad idea, but you don't need a fancy pants carbon micron one. Just something to keep the big stuff out of the lines.

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