4 ms·You're right it isn't, but it is storing the water on top of the house.by soperj 4y agoYou're right it isn't, but it is storing the water on top of the house.adamc 4y agoYes, but I'd expect it's much lesser amounts. 80 gallons is a decent sized water heater.soperj 4y agoahhh i understand what you were saying now.