They do sell water heaters. I doubt they have the point of use 4 gallon in stock, but they can order it from the true value warehouse. They get stock twice a week so it would not take long. You could also buy it online at Truevalue.com and have it shipped to the store for free.
I know they sell water heaters but not sure if they are electric.
I don't know that one either.
I'm sorry but I don't know
Thanks! Your answer is awaiting moderation.