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07-15-2010, 01:03 PM
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#1
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4 Rivet Member
1975 31' Sovereign
Houston
, Texas
Join Date: Nov 2003
Posts: 494
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Fresh Water fill from City Inlet question
In a previous Fresh Water Thread
> http://www.airforums.com/forums/f443...ase-66637.html< http://www .airforums.com/forums/f443/need-diagram-explained-please-66637.html
the valved bi-pass loop around the pump was discussed.
If one opens that bipass valve and is filling the (under the floor) Fresh Tank that way;What happens if you do not turn it shut after it is filled.
Does it equalize and just quit, or is there an overflow?
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____ d'drummer ____
...aahh..rumm..pu..tum..tummm...
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07-15-2010, 01:57 PM
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#2
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Site Team
2002 25' Safari
Dewey
, Arizona
Join Date: Mar 2005
Posts: 15,606
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Based on the diagram in the other thread the output side of the pump would never pressurize since water would be returning to the input side of the pump. My guess is that the pump would run forever, pumping the same water around the loop.
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Richard
Wally Byam Airstream Club 7513
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07-15-2010, 02:06 PM
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#3
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4 Rivet Member
1975 31' Sovereign
Houston
, Texas
Join Date: Nov 2003
Posts: 494
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Thanks Richard, but my question does not address that exact diagram. Mine is under floor tank, that diagram if I recall is an above floor.
Not that that would make any difference, (or would it)?
Would the pressure from the city line finally fill the Fresh Tank and then push water back up and out of the manual fill door outside the trailer curbside? (That is if the valve ws not shut off after filling).
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07-15-2010, 02:12 PM
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#4
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Site Team
2002 25' Safari
Dewey
, Arizona
Join Date: Mar 2005
Posts: 15,606
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If the city supply line is shut off, there is no additional water to overfill the tank. The I don't think the location of the tank would make any difference.
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Richard
Wally Byam Airstream Club 7513
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07-15-2010, 02:16 PM
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#5
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Wise Elder
2010 30' Classic
Vintage Kin Owner
South of the river
, Minnesota
Join Date: Dec 2009
Posts: 4,169
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Maybe, if the fill cap is off. It also might burst the tank or raise the floor. There have been incidents of serious damage from overfilling.
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07-15-2010, 03:57 PM
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#6
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Rivet Master
1960 28' Ambassador
Vintage Kin Owner
1998 25' Safari
Avonton
, Ontario
Join Date: Sep 2005
Posts: 1,331
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Quote:
Originally Posted by Distantdrummer
Thanks Richard, but my question does not address that exact diagram. Mine is under floor tank, that diagram if I recall is an above floor.
Not that that would make any difference, (or would it)?
Would the pressure from the city line finally fill the Fresh Tank and then push water back up and out of the manual fill door outside the trailer curbside? (That is if the valve ws not shut off after filling).
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You need the manual fill door open to let the air out when filling. When full, the water will come out the fill door and keep the pressure from blowing the tank.
__________________
Doug & Terry
VAC - TAC ON-1
60 Ambassador Int.
1950 Spartan
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07-15-2010, 05:32 PM
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#7
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4 Rivet Member
1975 31' Sovereign
Houston
, Texas
Join Date: Nov 2003
Posts: 494
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If in fact the Fresh Tank is in danger from over filling while connected to City Water, then there should be a laminated or engraved warning sign/decal/plaquard prominently visible near the valve knob.
I have never seen such a warning label nor read of this over fill danger. I keep a rubber plug (cork) in the manual fill line behind the fill door to keep bugs & dirt out. I assume City pressure would pop it out. Next time I am hooked up I will experiment. The storage lot has no water or I'd go do it sooner.
BTW you can get the rubber corks at Lowes or most any hardware store.
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07-15-2010, 05:38 PM
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#8
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Rivet Master
1991 34' Excella
1963 26' Overlander
1961 26' Overlander
Central
, Mississippi
Join Date: Nov 2006
Posts: 5,919
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My '91 has a system built in...although I have only used it once...
AutoFill...it's a button buy the pump switch. Turn off the pump, hit 'AutoFill' and it energizes a 12v solenoid (where your proposed manual valve is inserted) UNTIL THE TANK IS 3/4 FULL. Then it shuts off, supposedly...
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