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Old 04-09-2015, 09:20 AM   #1
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Keeping water in fresh water tank for long periods

Currently, I am only able to use the MH (2015 Hurricane 34e) about once a month for long weekend trips. I would like to keep a little bit of water in the fresh tank just to have in the coach for emergency, cleaning or what not. My storage location does not have any water available, so I have to fill the tank while at my most recent campground. So my question is, is keeping a little bit of water in the fresh tanks for a few weeks a good or bad idea? I am thinking along the lines of it getting moldy or such.

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Old 04-09-2015, 09:32 AM   #2
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I keep water on board for long periods of time , and have yet to have any issues. I do not drink the water; unless it is from my home and only for a week or 10 days after sanitizing the tank. If you are concerned about the quality of the water you put into the tank , then drain a little water from your supply hose and pour 1/4 cup of bleach into the hose before adding water to the fresh tank through the city water hook up.

If you use the tank water for an ice maker in your fridge, you would want to sanitize the tank before using that water for ice.

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Old 04-09-2015, 09:39 AM   #3
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I keep my tank full. The less air in the tank the better. I drain & refill about once a month. I sanitize every third month or so.
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Old 04-09-2015, 09:43 AM   #4
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The first thing you should try to find out is if the campground has municipal water or if they are on a well. If they have municipal water, by law, it has residual chlorine. That is enough for most situations.

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Old 04-09-2015, 09:55 AM   #5
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ok, thanks all.....great input, I guess water will stay in the tank now. I did sanitize when I bought it 2 months ago, but since we are using infrequently, we just carry bottled water for now on the week end trips.
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Old 04-09-2015, 09:56 AM   #6
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And if there is no residual chlorine and not much air it will be fine. The problem, if there is one, will be airborne contamination. As NRR said the less air the better.
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Old 04-09-2015, 09:59 AM   #7
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We keep about 25 gallons in our tank. Just use it to flush toilet, wash hands while on the road. We don't use it for drinking & I do sanitize it. No sense carrying around an extra 834 pounds that isn't necessary (100 gallons x 8.34 pounds per gallon).
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Old 04-09-2015, 10:07 AM   #8
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You could also add a small bit of chlorine when filling up. Think pool shocking, but on a weaker scale. Not near the amount to actually sanitize, but a shock to the water. Chlorine will naturally separate out of the water, so it will off gas out your vent. Just don't run your pump after adding; the water in the lines will not separate as there is no where for the chlorine gas to go.
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Old 04-09-2015, 10:08 AM   #9
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I live in earthquake country, so I always keep the water and fuel tanks full.
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Old 04-09-2015, 11:20 AM   #10
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If your municipal water source uses chloramines instead of chlorine to disinfect their water, that would be even better, Chloramines carry a residule longer than regular chlorination.
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Old 04-09-2015, 08:06 PM   #11
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A couple of things to keep in mind. We use a two stage filtration system that includes an activated carbon filter. This will remove chlorine before it gets to your tank. Another idea is to sanitize from time to time with sodium dichlor. You can get it at pool supply stores. I wrote about it in this post.
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Old 04-09-2015, 08:19 PM   #12
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I keep the tank about full. Drain it for winter and sometimes sanitize it int he spring. We're on city well water and they use chlorine in it. With the Dutch Star I had a whole house sediment only filter so that left the chlorine in it in the tank. Then I had a separate drinking water spigot that had an "everything" filter on it.
May have to change my method for the Magna as it has a 3M "everything" filter for the whole rig. Not sure I like not having chlorine in the water tank as then the water can go bad. Will need to look into it more.
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Old 04-10-2015, 05:44 PM   #13
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Keeping drinking water safe

An aside to your question is a personal experience. Back in the late 1970's I worked with a crew that was tasked with dismantling fall-out shelters at the local university. We opened a few sealed barrels of drinking water, obtained samples which were then tested for human consumption safety. Every barrel test result came back "safe for consumption". Those barrels were dated in the mid to late 1950's.
You will find this document useful: http://ndep.nv.gov/bsdw/docs/disinfe...king_water.pdf

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