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05-31-2018, 07:17 AM
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#1
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Junior Member
Join Date: Oct 2017
Location: Spring Hill, FL
Posts: 6
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Fresh water tank fill problem
I have an '05 Mandalay by Four Winds (Thor). When I try to fill the fresh water tank the water runs out of two openings on the opposite side of the coach as fast as I put it in. The fill is on the drivers side and the openings are on the passengers side. There is a dump valve on the drivers side but it is closed. Please help this is driving me crazy!
tia
Jim Nastelli
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05-31-2018, 07:20 AM
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#2
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Member
Join Date: Jan 2014
Location: Toronto, ON
Posts: 54
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The tank isn't already full by chance? Most tanks have an overflow outlet when they are full.
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05-31-2018, 07:28 AM
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#3
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Senior Member
Join Date: Jun 2012
Location: The Bluegrass State
Posts: 8,889
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What are the "two openings on the other (passenger) side" supposed to be for?
__________________
Good Luck, Be Safe and Above All, Don't Forget To Have Fun 
Pete
Central Kentucky
2006 Fleetwood Discovery 35H, 2014 Honda CR-V, M&G Engineering Braking System
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05-31-2018, 07:48 AM
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#4
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Senior Member
Join Date: Jan 2017
Location: Titusville, FL
Posts: 5,164
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Sounds to me like your low point drains are open.
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When seconds count, the police are only minutes away.
2023 Grand Design 2600RB, 2022 F-350 King Ranch tow vehicle, Titusville, FL when not on the road
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05-31-2018, 08:01 AM
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#5
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Junior Member
Join Date: Oct 2017
Location: Spring Hill, FL
Posts: 6
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No, it actually never reads full.
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05-31-2018, 08:02 AM
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#6
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Junior Member
Join Date: Oct 2017
Location: Spring Hill, FL
Posts: 6
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I think for overflow.
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05-31-2018, 08:06 AM
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#7
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Junior Member
Join Date: Oct 2017
Location: Spring Hill, FL
Posts: 6
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Thanks for the reply. What does that mean and what can I do about it?
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05-31-2018, 08:07 AM
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#8
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Junior Member
Join Date: Oct 2017
Location: Spring Hill, FL
Posts: 6
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Quote:
Originally Posted by hohenwald48
Sounds to me like your low point drains are open.
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Thanks for the reply, what does that mean and what can I do about it?
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05-31-2018, 08:14 AM
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#9
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 15,749
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Low point drains valves are used to drain water from all pipes - typically when preparing for winter cold weather storage. Additionally your fresh water tank likely has a drain valve. Find these valves and ensure they are closed.
The fresh water overflow is a tube extending from the top of the water tank. Used to ensure the tank is not overfilled. When filling the tank one usually fills until water starts to come out of the overflow - indicating the tank is full. Its common for a siphon action to occur and water to continue to come out the overflow for a couple few minutes after shutting off the incoming water.
__________________
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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05-31-2018, 08:16 AM
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#10
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 15,749
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Quote:
Originally Posted by JiminFla
No, it actually never reads full.
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Don't necessarily trust the sensor readings.
__________________
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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05-31-2018, 08:45 AM
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#11
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Junior Member
Join Date: Oct 2017
Location: Spring Hill, FL
Posts: 6
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Quote:
Originally Posted by vsheetz
Low point drains valves are used to drain water from all pipes - typically when preparing for winter cold weather storage. Additionally your fresh water tank likely has a drain valve. Find these valves and ensure they are closed.
The fresh water overflow is a tube extending from the top of the water tank. Used to ensure the tank is not overfilled. When filling the tank one usually fills until water starts to come out of the overflow - indicating the tank is full. Its common for a siphon action to occur and water to continue to come out the overflow for a couple few minutes after shutting off the incoming water.
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I think you are on the money. I'll look for the low point valve but I think the siphon action is what I have been bugged by.
Thanks much.
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