Presuming an XL-100 Pressure relief is installed; The Tank is Pressure rated to almost twice what the relief valve blows at, by ASTM. Bochs Heaters are all built to commercial standards, far and away the best you could have spent youre money on.Having installed them for 12 years in the NYC area, they are the best built. Besides the warrenty should cover you for many years to come.If you need further advice I would reccomend Emanuel Troise Jr He is an expert Plumbing witness in the City of New York, and wrote the Code book, Im sure he would help you out . Good Luck , John The Plumber
