Residential natural gas-fired atmospheric water heater FVIR compliant, 60 US gal, glass lined inner tank, insulated with 2 in. ecofriendly Greenfoam, equipped with a 52 000 B.T.U. burner, an installed T and P relief valve, a brass drain valve, 3/4 in. N.P.T. dielectric plumbing connections, and carries a 6 year limited warranty agains inner tank leakage.(607/8x23.5).