Is my hot water heater dying?
Two things: first, a brownish particulate accumulates in the screen of the showerhead. I have to clean it every couple of weeks; second, last night, we ran out of hot water, and the cold water that came out at the end left a reddish residue on the floor of the shower. Is this as ominous as it sounds? What does a new one cost (large enough for a family of 3 in the upper duplex of a 4 story brownstone)? Thanks for any insight
