I've never once had a customer complain about too much hot water. When upsizing its important to be sure the new tank can physically fit the space, as well as with additional height there's still sufficient upward grade to the chimney, and correct chimney sizing (40 US Gallon tanks have a 3" chimney, larger tanks typically have a 4" chimney, though larger do exist).
Soap test those gas pipe joints!!
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"The trouble with people idiot-proofing things, is the resulting evolution of the idiot." Me
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