Installed a 50 gal about a year ago and have had no problems that I know of.....I was a little worried We installed one of those Kohler custom showers like you see on tv commercials. I believe it was a DTV valve ( the electronic mixing valve) the shower had 3 tile shower body sprays, one overhead which was the equivelent to four of the body spray(8"x8") , a handheld spray, and the standard shower head. I think all running it was over 20 gpm. Was like a carwash. We were very concerned that it would run out of hot water but the customer said that he and his wife take very long showers and have yet to have a problem.Glad to hear that .....thought that i was going to havft to add a storage tank just for the shower.
Not to change the subject but is anybody having problems with the Powershots? Have had nothing but problems with them straight out of the box. igniters, harnesses,flammable vapor sensors,gas valves, blowers you name it. Very frustrating when you look at the cost of them. I am looking to change any ideas?