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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