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Old 08-13-2018, 03:16 PM   #1
Winnebago Camper
Join Date: Jul 2018
Posts: 8
View Fresh Water Overflow Leak? Siphon?

We have a “new to us” 2014 View 24V. Filling the fresh water tank via the direct connect is easy. After completing I turn the lever from “Tank Fill” to “Normal”.
The water pump is off and all faucets are off. I arrive each time (after a two hour highway trip) with 2/3 tank of fresh water. I do note that when filling the tank that it overflows out of a small tube directly behind the fill location. The tube has what looks like about three inches of plastic screening on the end. After arriving and setting up, it never leaks again but I never arrive at our boondock site (usually a Harvest Host Vineyard) with a full tank of water.
Admittedly, I’m new to this and must be missing something. Any suggestions are appreciated! Thanks!
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Old 08-13-2018, 06:14 PM   #2
Join Date: Jun 2015
Location: The hilly part of Texas
Posts: 265
Could be: RV is not level when filling; air bubble trapped in tank and it "burps" when driving due to motion of the RV; vent tube is not at highest point in tank......
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Old 08-13-2018, 06:34 PM   #3
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Join Date: Jul 2018
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Good thought....

Good thought but I know I was level each time. If it was a “one off” I wouldn’t be concerned but losing 1/3 of my available water is not a good thing. Hoping to boondock some in the desert this winter and would like to maximize my time there before heading back to town. Thanks for the feedback and I’ll be sure to keep that in mind going forward.
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Old 08-14-2018, 06:40 AM   #4
Join Date: Jun 2015
Location: The hilly part of Texas
Posts: 265
I hear your concern... Sorry... "Level" doesn't mean the tank is level. My bad. RV can look level but tank may not be. Fore, aft, port & starboard level on the tank.

There's two fill ports. Have you tried using the gravity fill next to the vent port? When topping up or maintaining our tanks, I always use the gravity fill. Fill until it runs out the vent.

I only use the auto-fill at GGs. And, I don't put in but just enough to get through a day and emergencies. Maybe 1/3 to 1/2 a tank.

Gauges are only accurate when tank is empty or water is venting out.. You can use a couple gallons and may show only 2/3 left.

On a 14 24G, there's a kick up next to the bed above the "water closet". If you pull the cover you can see the pump, plumbing, filter, & tank. Fill'r up and take a look to see if its full.
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Old 08-14-2018, 12:18 PM   #5
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Join Date: Aug 2016
Location: Des Moines, IA
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WE have a 2017 Era 70X. Same situation -- full tank at the fill site, but 2/3 a ways down the road. Here is what I surmise:

Tank level sensors are full/2 thirds/1 third/empty. Nothing in between. Full means full and empty means empty.

2 thirds means less than full and more than 1 third. 1 third means less than 2 thirds and more than empty. Our "full" sensor doesn't show full unless the tank is really full -- flowing out the vent.

I think that when you see the 2 thirds indication that you really have a nearly full tank -- just not "fully" full. You could test that theory by measuring the tank output as you drain it.
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Old 08-15-2018, 12:05 PM   #6
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Location: Northern California
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If you also have a gravity fill location for your tank, Winnebago instructions state to open it when using the tank fill valve/knob. I'm not sure, but I think this allows the air in the tank to burp/escape when filling.
2016 Winnebago Vista LX 30T
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Safe T Plus steering, Koni FSD shocks, rear track bar, heavy duty anti-sway bars
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Old 08-15-2018, 12:37 PM   #7
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Location: New Hudson, Michigan
Posts: 56
i had the same problem it seems like the tube has dropped or is not in far enough and when you make a turn or go up or down hill it syphons off my solution was to add a shutoff valve to the tube now no problem but open it when filling or on site only close when driving
Cathy and Gordie Connelly
2006 Winnebago Sightseer 29 R
GMC Terrain on a dolly FMCA # F461058
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fresh water, leak, water

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