How to avoid mould in water tank between uses - Fiberglass RV


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Old 06-30-2014, 10:36 AM   #1
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How to avoid mould in water tank between uses

Hi, sorry for the pretty simple question but I can't figure out what is best to store the trailer water tank over the summer......right full or empty? If empty, how do you drain it so that it actually dries completely and does not start any mould? This would be on our trillium 4500. I have a tank drain, but it does not drain every bit of water. I did put in a tiny amount of bleach when I filled it up for our maiden voyage over the past weekend as we are on well water not chlorinated city water
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John
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Old 06-30-2014, 10:47 AM   #2
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Originally Posted by Tyhee View Post
Hi, sorry for the pretty simple question but I can't figure out what is best to store the trailer water tank over the summer......right full or empty? If empty, how do you drain it so that it actually dries completely and does not start any mould? This would be on our trillium 4500. I have a tank drain, but it does not drain every bit of water. I did put in a tiny amount of bleach when I filled it up for our maiden voyage over the past weekend as we are on well water not chlorinated city water
Thanks!
John
I would always store with a full tank. Less air less chance of bugs growing.
Get a good ceramic water filter and always use it when fill the water tank.
Once a year drain, and sanitize the tank. I use a cleaning and sanitizing 2 part that I purchased from Camping World. There's enough in the kit to last for as long I'll be needing it. Here it is.

FYI this has worked well for me for the past 8.5 years.
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Old 06-30-2014, 01:12 PM   #3
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The pioneers used to toss some silver coins in their water barrels before heading out in the Conestoga wagons; silver kills a lot of stuff. I wonder if it would be practical to drop a couple of old dimes or quarters into the tank? They should be heavy enough to not rise into the outlet and go anywhere, seems like.

I read just the other day that if residentially-treated water is used, it should be fine for 6 months.
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Old 06-30-2014, 02:28 PM   #4
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Originally Posted by Mike Magee View Post

I read just the other day that if residentially-treated water is used, it should be fine for 6 months.
I think chlorinated water is fine left in the tank but as I found out the hard way it may not be such a good idea to leave well water sitting (picked up along your travels) in a tank in warm/hot weather - whether it be fresh or hot water tank. Could end up pretty stinky after a week or two....
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Old 06-30-2014, 03:15 PM   #5
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I carry 2 blue 7 gallon jugs plus my 15 gallon water tank(and 6 gallon water heater) when i travel. My mom's well tastes good and is tested....who knows what the water is like in strange places. Spent 4 days upstate NY, a shower each night and came home with one full water jug and some in the tank...was also probably drinking a gallon of it a day too.
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Old 06-30-2014, 05:00 PM   #6
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Stop worrying and filter

To all you that worry about the water. Get a good ceramic filter, one with a charcoal core is best. FILTER all water before it enters your fresh water tank. The small cost of a filter is well worth the savings in work and possibly a ruined trip. It doesn't matter if it your city water or your well water, or campground water, filter it all.

Clean and sanitize the tank one a year.

Keep the tank full as much of the time as possible. Stuff can't grow is water without air. Stuff grows in moist areas not flooded areas. The insides of an almost empty tank are moist and can grow all sorts of stuff, the sides flooded and it's a different matter.

If you're still obsessed with it add a teaspoon of Clorax to a full tank.

Now don't worry about the water just go out and enjoy.
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Old 07-01-2014, 12:23 AM   #7
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Understood thank you all. Seems like I'm on the right track, but did want to clarify I was wondering how, say at the end of the season how you would get the tank dry so as not to grow any unwanted friends. I was thinking of keeping the fill cap off , drain open, and air compressor line stuffed in with low volume air.. probably overkill ....but seriously I think I remember a photo of a very black trillium water tank with mould and do not want that to happen and I figure only way is to get the tank very dry.
? Maybe rubbing alcohol would dry it out?
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Old 07-01-2014, 12:27 AM   #8
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If you added a couple tablespoons of chlorine bleach to the tank, filled it, and gave it a couple days before draining it, any remaining water would have been treated and not be an issue.
And, I see you are in BC, so there is a good chance that the water you have been using is already chlorinated.
I keep 100 litres of water in plastic containers in my carport as part of my earthquake emergency kit. I add a few drops of household bleach to each 20 litre container. I drain and refresh every six months.
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Old 07-01-2014, 04:16 AM   #9
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Good comments have been made for you. You may also want to look into installing a deck plate to your tank for cleaning. There are a number of posts on them.
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Old 07-01-2014, 04:16 AM   #10
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You need a deck plate, we have one and I love it as you can get right in there remove all the water and clean it.
Questions on a water tank deck plate install
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Old 07-01-2014, 02:22 PM   #11
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Ok great! Thanks again. I have never heard of a deck plate until now so I will definitely look into that.
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Old 07-01-2014, 02:55 PM   #12
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Curious, are the deck plates 'food safe' ?
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Old 07-01-2014, 05:59 PM   #13
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Originally Posted by Dave_L View Post
Curious, are the deck plates 'food safe' ?
Probable as safe if not safer than the plastic used to build the water tank in your 78 Trillium

You do need to watch what you seal it with though.
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Old 07-08-2014, 07:00 AM   #14
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I'm not sure about this mold issue. I guess I should be on the lookout for it? I do see little circles on the top part of the plastic water tank when you're looking down on it. Didn't look like mold to me.

I did re bleach my water tank again. After going to a campsite with rusty water a month ago I just thought it prudent. Would wAter smell funny if mold was in tank? I purposefully swished it around in my mouth after this bleaching and rinsing and it tasted great. I imagine the water might taste like a musty basement if it were moldy? Please advise...so much to think or worry about!


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