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02-19-2012, 05:20 PM
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#1
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Seasoned Camper
Join Date: Oct 2011
Location: Derby
Posts: 91
M.O.C. #11859
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Fresh water tank overflow
While I was installing my skid wheels yesterday I noticed there is no sign of an overflow for the fresh water tank. The drain line is there but no overflow. Is there something I am missing? It has the fill in the back in a small lockable compartment and the fill switch in the front where the city water can fill it. My old unit had the overflow right next to the drain. Is there supposed to be one or do you just watch the indicator light and stop when it reads full?
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02-19-2012, 10:40 PM
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#2
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Montana Master
Join Date: Mar 2011
Location: Okeechobee
Posts: 2,150
M.O.C. #11206
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Hi
The overflow is inside the door with the lock on it in our trailer.
When I fill using the fill valve I open the door and remove the fill cap. When the tank gets full water runs out both openings in a fair amount of volume. I am not sure the overflow alone is big enough to handle all of the water without building pressure in the tank.
Phil P
__________________
2009 Montana 3665RE
2009 Duramax 3500 DRW quad cab
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02-20-2012, 02:42 AM
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#3
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Montana Master
Join Date: Dec 2002
Location: Rapid City
Posts: 739
M.O.C. #77
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You will find that most MOCers agree with Phil P in filling the fresh water tank. If you use the power fill, open the little door, and remove the cap from the fill line. The little "overflow" line next to it just can't handle the volume of water that the power fill will supply.
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02-20-2012, 03:01 AM
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#4
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Montana Master
Join Date: Oct 2009
Location: Navarre
Posts: 1,527
M.O.C. #9765
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Once upon a time at Chatfield State Park in Co, I verified the fresh water tank overflow to the amusement of several neighbors. That little overflow line certainly handled the volume just fine. Having said that, if I were intending to fill my fresh water tank, I would also remove the manual fill cap.
Mike
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02-20-2012, 03:38 AM
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#5
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Montana Fan
Join Date: Feb 2012
Location: Homosassa
Posts: 307
M.O.C. #12211
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I was told to remove the fill cap when filling the tank from a water hose.
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02-20-2012, 03:44 AM
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#6
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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I usually flip the fill valve and then go back and open the door and remove the hose fill cap. In just the minute or less that it takes to do that there will be a release of air pressure when I take the cap off leading me to believe that the overflow tube isn't even big enough to release the air pressure when using the fill valve let alone the water when it's full.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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02-20-2012, 03:51 AM
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#7
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Montana Master
Join Date: Oct 2009
Location: Navarre
Posts: 1,527
M.O.C. #9765
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Dick,
Leads me to believe you have a blocked vent tube.
Mike
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02-20-2012, 04:14 AM
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#8
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Montana Master
Join Date: Feb 2008
Location: Hillsboro
Posts: 593
M.O.C. #8238
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In filling the tank, I also remove the cap, just in case. I have found that it depends a lot on the water supply. At home, with 60 pounds pressure, the "power fill" goes quite quickly. One time though, we were at a small campground that had a "lethargic" water system that was so bad, we had to supplement our trailer water use with our on board pump. When I filled the tank there, the overflow barely trickled. Just depends on water pressure and flow at the location you are filling from. But, an ounce of prevention.......!!
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Terry and Patsy
Vietnam Veteran, US Navy
2017 3810
2015 GMC Sierra 4X4 3500 SRW
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02-20-2012, 04:19 AM
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#9
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Seasoned Camper
Join Date: Oct 2011
Location: Derby
Posts: 91
M.O.C. #11859
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Thanks everyone. That's exactly what I have. The small vent to the right of the filler hole with a screen on it. Both of my previous 5ers had an additional hose running out of the bottom, that's what I was looking for. I sure will be glad when next month gets here so we can finally get on the road and try everything out. Buying a new rig just before winter isn't the easiest thing to go through. But, I think the savings on the price was worth it.
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02-20-2012, 05:24 AM
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#10
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Montana Master
Join Date: Aug 2011
Location: Vancouver
Posts: 1,284
M.O.C. #11675
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I've never had a fill system like this, just the city and water tank inlets. With these you can hook up to city water and then switch it to fill the fresh water holding tank - correct? What is the full procedure then? I see now you uncap the water tank inlet, and then do you just monitor the gauge? Is it best then to reduce water flow once it is almost full so as not to get a lot of overflow? Thanks for any help!
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02-20-2012, 05:53 AM
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#11
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Montana Master
Join Date: Oct 2009
Location: Navarre
Posts: 1,527
M.O.C. #9765
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Greg,
If I wanted to fill my fresh water tank to it's maximum capacity, I would use either method.
1. Hook up at the convience center and fill from there with the manual fill cap removed. When water comes out the cap you are full.
2. Fill at the manual fill port with a hose.
Mike
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02-20-2012, 06:54 AM
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#12
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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It would be a two person job to monitor the gauge since it's inside on the other side of the coach. I doubt the gauge is that accurate when filling anyway.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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02-20-2012, 07:03 AM
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#13
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Montana Master
Join Date: Aug 2011
Location: Vancouver
Posts: 1,284
M.O.C. #11675
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Thanks Mike and Dick, appreciate the help.
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02-20-2012, 12:07 PM
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#14
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Montana Fan
Join Date: Sep 2009
Location: Claypool
Posts: 279
M.O.C. #9711
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Just a thought. A friend of mine developed a problem with one of the faucets in the bathroom (leaking) he purchased a new one and when we took the old one off, we found a dead bug wedged in the valve. After discussing and thinking about it, we concluded that at some time while filling the tank (or venting it) a bug got in the open fill hole and eventually found its way into the water line that supplied the bathroom. Leaving the fill cap off may not be the best idea, even if it is only for a few minutes.
Don
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02-20-2012, 02:14 PM
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#15
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Montana Master
Join Date: Aug 2006
Location: merced
Posts: 983
M.O.C. #6171
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Are you sure the bug hadn't got into the hose at some time in his travels
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02-21-2012, 03:55 AM
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#16
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Montana Fan
Join Date: Feb 2007
Location: Bayswater
Posts: 317
M.O.C. #6781
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I would always fill my tank from the convenience centre without taking the cap off. One day it became just too much pressure and the line came apart just below where it connects to the plastic opening at the rear. While I was waiting for a good flow of water to escape at the back the inside of my trailed was filling up with water. The dealer told me to always remove the cap at the overflow because too much pressure can build up and if the connections are not all tight enough one will give way. That's what happened to me. The floor dried out but it's not something you really want to happen.
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02-21-2012, 09:28 AM
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#17
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Montana Master
Join Date: Aug 2011
Location: Vancouver
Posts: 1,284
M.O.C. #11675
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Quote:
quote:Originally posted by Jim Jarvis
I would always fill my tank from the convenience centre without taking the cap off. One day it became just too much pressure and the line came apart just below where it connects to the plastic opening at the rear. While I was waiting for a good flow of water to escape at the back the inside of my trailed was filling up with water. The dealer told me to always remove the cap at the overflow because too much pressure can build up and if the connections are not all tight enough one will give way. That's what happened to me. The floor dried out but it's not something you really want to happen.
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Thanks Jim. These are the great tips we get here. Just too bad we can't get all this knowledge first from the dealer BEFORE we learn the hard way...
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03-22-2012, 05:20 AM
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#18
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Seasoned Camper
Join Date: Jul 2011
Location: Tomball
Posts: 83
M.O.C. #11565
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I have NOT been opening the back water fill but after this discussion, I certainly will begin doing it. Thanks for the information. You all probably saved me from flooding my trailer. Thanks again, I really do appreciate it.
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03-22-2012, 03:12 PM
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#19
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Montana Master
Join Date: Oct 2011
Location: Lykens
Posts: 545
M.O.C. #11842
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Begs for the question to be asked "Why in the hell would a company install an air purge line too small to handle filling from the power fill".
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