50 gal. residential electric water heater, 4500w rheem ' electric water heater, residential, tank capacity 50 gal., voltage 240vac, 1 phase, 4500 total watts, overall height 58-5/8 in., jacket dia. 20-3/8 in., recovery @ 90 f rise 21.0 gph, height to t and p opening 58-5/8 in., height to cold side connection 58-5/8 in., height to hot side connection 58-5/8 in., max. pressure 150 psi, top connection location, water connection 3/4 in. npt, 18.8 amps ac, number of elements 2, energy factor 0.95, temp. range 120 degrees to 160 degrees f '