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Old 07-25-2016, 05:30 AM   #1
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Join Date: Apr 2007
Location: Torrington
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M.O.C. #7038
Water tank capacity

does anyone know the capacity of the water tanks (fresh,grey,galley,black)?
2007 Montana 5th wheel 3475RL
I checked the manual but no entry
Thanks as always
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Old 07-25-2016, 06:55 AM   #2
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Believe keystonerv.com still maintains a page on prior year rigs and specs
Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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Old 07-25-2016, 06:56 AM   #3
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Google is your friend..
Fresh Water 60
Waste Water 38
Gray Water 76
LPG 60

2016 3610/2012 F-350 Powerstroke
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Old 07-28-2016, 07:35 PM   #4
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Take note that the 76 gallons of gray is typically split between TWO gray tanks. For example, my '06 is documented as 76 gallons of gray, but the rig actually has two gray tanks of 38 gallons each. One is marked "Galley" for just the kitchen sink to drain into, and the second tank is labelled "Gray" where the shower and lavatory drain into. Each tank has its own valve for draining purposes, All these tanks including the black then converge into a common drain when connected to a campground dump location.

Another note. The 60 for propane is lbs of propane NOT gallons, which is typically split between two 30 lb propane tanks. The number refers to the pounds (weight) of the propane inside each propane tank when full. With a gallon of propane weighing a little more than 4 lbs per gallon this translates that a 30# tank holds a little more than 7 gallons of propane.

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