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12-08-2015, 04:13 AM
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#1
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Member
Join Date: Apr 2015
Location: Tennessee
Posts: 83
SUN #7218
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Mysterious Water in my Fresh Water Holding Tank
This is weird. I am full-timing in one spot, hooked up to a regular pressurized water supply, I have a pressure regulator in place. When I first parked 2 months ago, there was a visible 1/2 inch of water in the fresh water holding tank under the bed. Now as of this weekend, there is now magically almost a 1/2 a tank of water in the tank!
The fill cap door is locked and secure. What the heck happened? There must be some sort of overflow? We had a bunch of rain a few days ago... is there some sort of weird rain-water collection I don't know about??
How could the water get in there? I thought the fresh water tank was a completely separate system from the city water fill.??
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2003 Chevy Tahoe Z71
2002 Sunline Lite 1950
2005 Mercury Montego
Previous full timer 10/2015 - 8/2016
Previous full timer 1992-1996
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12-08-2015, 04:23 AM
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#2
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Member
Join Date: Apr 2015
Location: Tennessee
Posts: 83
SUN #7218
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Gross thought... I had the grey water latch closed so I could flush the black water tank. Can the grey water back up into the fresh water tank if the grey water goes too high?
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__________________
2003 Chevy Tahoe Z71
2002 Sunline Lite 1950
2005 Mercury Montego
Previous full timer 10/2015 - 8/2016
Previous full timer 1992-1996
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12-08-2015, 06:31 AM
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#3
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Senior Member
Join Date: Apr 2011
Location: Maine
Posts: 3,357
SUN #2097
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Check valve in the water pump. There are two valves in the water system one keeps the water from running out the city water port when the pump is running and the other one in the pump keeps the city water from filling your fresh water tank.
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12-08-2015, 08:26 AM
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#4
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Senior Member
Join Date: Sep 2006
Location: Maryland
Posts: 1,131
SUN #64
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Quote:
Originally Posted by mainah
Check valve in the water pump. There are two valves in the water system one keeps the water from running out the city water port when the pump is running and the other one in the pump keeps the city water from filling your fresh water tank.
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Yep, water pump check valve leak.
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2004 Dodge Ram 2500 Club Cab 4x4 CTD
2007 Sunline Solaris T-276-SR: Misty Blue/Cherry
2001 Dodge Ram 1500 Reg Cab 4x4 OFF-ROAD
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12-08-2015, 06:32 PM
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#5
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Senior Member
Join Date: Jan 2009
Location: Rhode Island
Posts: 1,515
SUN #768
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Quote:
Originally Posted by Rocketgirl
Gross thought... .....
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Yup, gross thought but the previous 2 posts nailed it.
When the grey tank gets full it will back up into the shower drain and into the tub.
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Gene & DW Ginny
2002 Sunline T-2363
2008 Toyota 4-runner 4wd 4.7L V-8
Reese Dual Cam straightline - P3 Brake controller
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12-09-2015, 04:16 AM
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#6
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Member
Join Date: Apr 2015
Location: Tennessee
Posts: 83
SUN #7218
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Ok, so my grey waste water won't ever back up into the fresh water tank, right? At least not without showing in the shower first, correct? I don't think the grey ever came close to backing up into the shower, I just could not figure how water magically filled the fresh water tank. So, other than having some city water leak into the fresh water tank from the hose connection via the pump check valve, there are no issues other than I may need to run from the pump if the water level gets too high, correct?
Question: Do I need to shut off the city water to clear the water from my tank by using the pump or does the water supply automatically switch to the fresh water tank when I turn the pump on?
Thanks!!
__________________
2003 Chevy Tahoe Z71
2002 Sunline Lite 1950
2005 Mercury Montego
Previous full timer 10/2015 - 8/2016
Previous full timer 1992-1996
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12-09-2015, 10:08 AM
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#7
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Senior Member
Join Date: Sep 2006
Location: Maryland
Posts: 1,131
SUN #64
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No, there is no physcal (pipe) connection to the grey tank. The water has to go into an open recepticle, the sinks or shower, before it drains to the grey tank.
The punp will only pickup water from the fresh water tank.
The pump will have to pump higher pressure than the city pressure to put water into the system.
The temporary fix is to turn off the city water, use the pump to bring the tank level down, then go back to city.
__________________
2004 Dodge Ram 2500 Club Cab 4x4 CTD
2007 Sunline Solaris T-276-SR: Misty Blue/Cherry
2001 Dodge Ram 1500 Reg Cab 4x4 OFF-ROAD
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12-09-2015, 11:23 AM
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#8
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Senior Member
Join Date: Jul 2013
Location: Pennsylvania
Posts: 182
SUN #5443
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Mack is right about the pump not working with city water on. You should not have to empty the fresh water tank by pumping it out. You should have a drain line under the trailer for the tank. Look under the trailer in the area of the tank. Open the valve and drain the tank. Then leave it open until you can replace the pump.
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12-09-2015, 05:54 PM
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#9
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Senior Member
Join Date: Apr 2011
Location: Maine
Posts: 3,357
SUN #2097
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Quote:
Originally Posted by Rocketgirl
Ok, so my grey waste water won't ever back up into the fresh water tank, right? At least not without showing in the shower first, correct? I don't think the grey ever came close to backing up into the shower, I just could not figure how water magically filled the fresh water tank. So, other than having some city water leak into the fresh water tank from the hose connection via the pump check valve, there are no issues other than I may need to run from the pump if the water level gets too high, correct?
Question: Do I need to shut off the city water to clear the water from my tank by using the pump or does the water supply automatically switch to the fresh water tank when I turn the pump on?
Thanks!!
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Just open the fresh tank drain and no the gray water can not get into the fresh water tank.
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12-09-2015, 05:58 PM
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#10
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Senior Member
Join Date: Apr 2011
Location: Maine
Posts: 3,357
SUN #2097
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If you do not have a water pressure regulator on your city water line it maybe why the pump check valve is letting water into the fresh tank. It a pretty simple system of valve and springs if the pressure is too high it can let water past the valves.
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12-13-2015, 01:06 PM
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#11
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Member
Join Date: Apr 2015
Location: Tennessee
Posts: 83
SUN #7218
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Thanks again for the info! For the record, I do have a pressure regulator in line with the incoming hose. Either it is a leaky valve or maybe I need a better pressure regulator. I do see a little drain nozzle on the outside of the trailer? I will give it a try.
__________________
2003 Chevy Tahoe Z71
2002 Sunline Lite 1950
2005 Mercury Montego
Previous full timer 10/2015 - 8/2016
Previous full timer 1992-1996
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12-13-2015, 04:10 PM
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#12
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Senior Member
Join Date: Apr 2011
Location: Maine
Posts: 3,357
SUN #2097
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I would recommend using your pump for awhile with the water in the tank to flush the toilet etc. Then hook your city water back up, after awhile that may wash any thing that maybe holding the valve open out. If that fails just leave the drain open.
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