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The source gas and venting requirements are why I still have 50 gallons of water on the side of my house. My current 3/4 gas line comes from the neighbor's yard, under the house, and over to the heater side. GasCo would have to run a whole new line from the street to get me to 1.5" The current vent would need to increase to something like a 4" hole in the roof, about double the current size. I just have a hard time with cutting holes in the roof.
But, in the likely event of earthquake, I have 50 gallons before I have to drink out of the toilet. . .
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