After my previous water heater failed after 31 years, I had a 30-gallon A. O. Smith Promax gas water heater installed on October 30, 2007. On November 17, after 19 days, the pilot light went out. For the next seven months, the pilot light continued to fail and had to be relit. The pilot failed sometimes every few days, sometimes every day, sometimes four times a day or more. Eventually, I had to relight the pilot light every time we needed hot water. The plumber who installed the Promax returned five separate times to try and fix it... read full review »