Reply
 
Thread Tools Display Modes
Old 06-11-2017, 09:21 PM   #1
Junior Member
 
Join Date: Feb 2017
Posts: 20
2017 wildwood clean water tank loosing water

I fill my clean water tank full. And when I get to my.destination I'm down to 1/3 of a tank. Why. The drain valve is closed. And I don't see.any leaks. Is it all sloshing out the overflow while traveling? I would think id be able to fill it and still have a gull tank when I get to where I'm going
__________________

micsol84 is offline   Reply With Quote
Old 06-11-2017, 09:39 PM   #2
Site Team
 
Mr. Dan's Avatar
 
Join Date: Mar 2014
Location: Grayson County, Texas
Posts: 11,901
Quote:
Originally Posted by micsol84 View Post
I fill my clean water tank full. And when I get to my.destination I'm down to 1/3 of a tank. Why. The drain valve is closed. And I don't see.any leaks. Is it all sloshing out the overflow while traveling? I would think id be able to fill it and still have a gull tank when I get to where I'm going
Apparently, it siphons out through the overflow/vent. You might do a search for 'siphon' and find what had been written in the past.
__________________

__________________
SEARCH is your friend!
FR Wildcat 295RSX / GMC Sierra

Nights Camped: '13 = 49/'14 = 74/'15 = 74/'16 = 85/'17 = 110/'18 =111/'19 = 74; booked = 12
Mr. Dan is online now   Reply With Quote
Old 06-11-2017, 09:56 PM   #3
Senior Member
 
Join Date: Jun 2012
Posts: 10,158
Explanation:
The vent line comes off the side of the tank (really should be off the top, but....). It goes UP and then turns and comes down (usually). This creates an upside down loop. When you go around a turn, the water sloshes up into the loop. Once it hits the top and goes down the other side, that creates the siphon and it will drain water from your tank until the level drops below where the vent is attached to the tank.

You have two potential fixes:
The best, if possible, it to reroute the vent line so it doesn't go back down. If you do this make sure that if water were to come out of it by overfilling, it has somewhere to go besides into your rig.

The second option, as some folks have done, is to install a closed valve in the vent line to prevent the siphoning. If you do this, you must be sure to re-open the valve when you're using and/or filling the tank. If not, you may blow up or collapse the tank.
__________________
1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)

2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
rockfordroo is offline   Reply With Quote
Old 06-11-2017, 10:14 PM   #4
Junior Member
 
Join Date: Feb 2017
Posts: 20
Do they make anything like an anti siphon valve that would allow venting and overflow without spilling?
micsol84 is offline   Reply With Quote
Old 06-11-2017, 11:25 PM   #5
Member
 
Join Date: Jul 2016
Location: Rothschild, Wisconsin
Posts: 30
Click image for larger version

Name:	IMG_0182.jpg
Views:	163
Size:	150.5 KB
ID:	141052
kzoromski is offline   Reply With Quote
Old 06-11-2017, 11:29 PM   #6
Member
 
Join Date: Jul 2016
Location: Rothschild, Wisconsin
Posts: 30
I had same issue. Water sloshing comes out vent lines. Installed 1 on vent line on each side. I just close the valves while driving. Works and pretty cheap fix
kzoromski is offline   Reply With Quote
Old 06-12-2017, 08:03 AM   #7
Senior Member
 
Join Date: Jun 2012
Posts: 10,158
Quote:
Originally Posted by rockfordroo View Post
Explanation:
The vent line comes off the side of the tank (really should be off the top, but....). It goes UP and then turns and comes down (usually). This creates an upside down loop. When you go around a turn, the water sloshes up into the loop. Once it hits the top and goes down the other side, that creates the siphon and it will drain water from your tank until the level drops below where the vent is attached to the tank.

You have two potential fixes:
The best, if possible, it to reroute the vent line so it doesn't go back down. If you do this make sure that if water were to come out of it by overfilling, it has somewhere to go besides into your rig.

The second option, as some folks have done, is to install a closed valve in the vent line to prevent the siphoning. If you do this, you must be sure to re-open the valve when you're using and/or filling the tank. If not, you may blow up or collapse the tank.
I was a bit off when I wrote this one. I should have said, route the loop high enough so the water can't slosh that high. But that usually means it will no longer loop back down. The truly ideal solution is a vent line long enough that you can raise the loop very high, but the bottom is still down under the rig.
__________________
1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)

2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
rockfordroo is offline   Reply With Quote
Old 06-12-2017, 01:52 PM   #8
Senior Member
 
Join Date: Jan 2016
Posts: 153
I had something similar on my 2017 Wildwood.. AS I filled the FW tank, it as soon as I got to 2/3 full, it would start to drain out the overflow. I had to cut the belly pan open, chip away some spray foam and re-route the overflow tube above the height of the tank and then back down again. there was enough slack in the pipe for me to get it done.

I then taped up the belly pan..
Jeff from Burlington Ont is offline   Reply With Quote
Old 06-12-2017, 07:24 PM   #9
Junior Member
 
Join Date: Feb 2017
Posts: 20
2017 wildwood clean water tank loosing water

Since building up pressure or vacuum in the tank is a major concern with putting a valve in the vent and leaving it closed. Would traveling with it closed be a bad idea too? With elevation changes and what not. I live Colorado and know very well the effect of elevation on sealed items (exploded bags of chips and shampoo bottles) etc. Changes from 5-11000ft are common
micsol84 is offline   Reply With Quote
Old 06-12-2017, 09:07 PM   #10
Senior Member
 
Join Date: Jun 2012
Posts: 10,158
Quote:
Originally Posted by micsol84 View Post
Since building up pressure or vacuum in the tank is a major concern with putting a valve in the vent and leaving it closed. Would traveling with it closed be a bad idea too? With elevation changes and what not. I live Colorado and know very well the effect of elevation on sealed items (exploded bags of chips and shampoo bottles) etc. Changes from 5-11000ft are common
The pressure change from elevation is not worth worrying about.

Pressure at sea level is 14.70 psi. According to this calculator, at 11,000 ft it's 14.69 psi. Essentially no change.

https://www.mide.com/pages/air-press...ude-calculator

(Use the calculator in the blue box.)
__________________

__________________
1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)

2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
rockfordroo is offline   Reply With Quote
Reply

Tags
tank, water, water tank, wildwood

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Featured Campgrounds

Reviews provided by


Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 03:17 PM.