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Old 04-28-2011, 12:44 PM   #1
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Fresh Water Tank Issues

Fresh Water. We have 80 gallons fresh water capacity. How often do you drain out your water or disinfect? Can the tank sit half full for a couple of months in between trips?
What secret tricks have you learned in dealing with water in RV in general?

Steve & Jean Kammerer
2011 Monaco Monarch 33SFS,
Thousand Oaks, CA
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Old 04-28-2011, 12:50 PM   #2
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Originally Posted by Stevepkam View Post
Fresh Water. We have 80 gallons fresh water capacity. How often do you drain out your water or disinfect? Can the tank sit half full for a couple of months in between trips?
I would not let it sit for a couple of weeks, forget about a few months. When we travel, we frequently keep 1/3 tank as we usually have full hookups.If we're not using the tank water, we dump it and refill at least every 2 weeks. Further more we don't drink the water .


Cliff,Tallulah and Buddy ( 1999-2012 )
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Old 04-28-2011, 03:10 PM   #3
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People puddle jump in their sailboats using water up to 5 weeks or longer without incident.
I grew up on a farm where we filled our cistern end of August (unchlorinated water) and drank it till the following April.
Don't fill your canteen downstream if there's a dead cow in the creek.
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Old 04-28-2011, 03:21 PM   #4
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I clean mine after each trip and before each fill If you ever drank bad water, it is not something you wish to repeat.
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Old 04-28-2011, 03:37 PM   #5
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Drain it after each trip, put just enough in to handle enroute toilet needs and hand washings. Always use bottled water for drinking needs.
Tom Wilds
Blythewood SC
2016 Newmar Bay Star Sport 3004
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Old 04-28-2011, 03:49 PM   #6
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I drain it & the water heater each time we are done, and it usually is cleaned and sanitized in the middle of the season once. We use bottled water for coffee.
Gary & Sandy Wilson
2008 Mountain Aire 4523
Des Moines Ia
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Old 04-28-2011, 04:39 PM   #7
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I'll jump in, just because. I have owned motorhomes continuously since 1979. During that time I would guess I average using it at least a couple of weekends a month (California guy). In all those years I bet I only put chlorine in the water tanks less than a dozen times (maybe less) and that was early on. Once in a while I will drain my tanks, but that may only be yearly. I would guess my water tanks are usually left half full. We use the holding tanks for drinking water. I am not a bottled water kind of person. We have never had an issue.
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Old 04-28-2011, 06:41 PM   #8
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Well I am in the middle of cleaning my entire water system in my coach right now. I don't think the previous owner had done a very good job of keeping up with it. I ended up pulling the water tank from the coach to do it right. You can see how far I've gone here: Flushing the fresh water tank

And just a little insight as to how bad my tank was. This is looking in the fill hole of the tank. Nothing like a little bacteria to start your day off right.
2003 Fleetwood Revolution 40'
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Old 04-28-2011, 11:17 PM   #9
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I leave water in my tank all the time. I drain and refill with added chlorine once a year. I open all of the faucets until I smell chlorine at each faucet. I let it set like that for a few hours and then I then refill and flush the tank until the chlorine smell is gone. Someone told me peroxide is better than chlorine so I am going to try that next time.

We do not drink the water in the tank, we carry bottled water for drinking and for making coffee.
Wayne & Roberta and Maggie the Miracle Dog
08 Winnebago Destination 39W Gas UFO Workhorse Chassis
Making the Journey in our Destination

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Old 04-29-2011, 11:51 AM   #10
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I never drink water from the tank; drain and flush obout every two months;
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Old 04-29-2011, 02:47 PM   #11
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We never drink bottled water.
If the water is chlorinated and not being used (as when we are connected to shore water) I sometimes let it stay in the tank for a month or so. If it's not clorinated maybe a week or two.
I haven't disinfected the system for several years but that is on the to do list for the next month or so.
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 04-29-2011, 07:41 PM   #12
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I sanitize the entire system once a year. We drink the water from the tank and fill/refill as needed. Once in awhile I'll drain & refill it if it has been sitting long in hot weather, mostly for taste reasons. However, if I have reason to believe the water source was not adequately chlorinated, I'll dump and refill when I get to a better source.
Gary Brinck
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Old 04-29-2011, 08:05 PM   #13
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I've been RVing since 1972 and fulltimed over ten years. I have never sanitized a fresh water tank and we drink the water. If you use city (chlorinated) water it is sanitized continously. Just don't use a chlorine filter between the city water and the fresh tank.

City water will remain good for months in the fresh water tank. This has been proven by tests.
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Old 04-29-2011, 10:14 PM   #14
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We consider our motorhome to be a lifeboat if needed in any sort of disaster situation. I try to keep it ready to leave in a very short time if needed. We have not had a problem with water. Hope to keep things that way, HarveyP

94 Holiday Rambler Endeavor LE

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