One of our hot water tanks was leaking in Nov. 2011. Access Plumbing and Heating came the same day to replace it. They advised us to replace the second one aoon. In May 2012 we noticed we were not getting hot water. We called them and they came within a few days and replaced the 2nd tank. They also suggested we change from a parallel system to a series making the new tank primary. We followed their suggestion. We now have all the hot water we need. The workers were efficient, courteous and they took away the old tanks without making any mess.