Patent ID: 8358920

Claim:
A tank for a water-heating appliance comprising: a body including a first end, a second end, and a longitudinal axis, the body extending along the longitudinal axis from the first end to the second end; a first head including a first plurality of landings, the first head coupled to the first end so that the first head is convex and extends away from the body, each of the first plurality of landings including a longitudinally outermost point, the longitudinally outermost points defining a first plane perpendicular to the longitudinal axis; and a second head including a second plurality of landings, the second head identical to the first head except for at least one opening through a landing, the second head coupled to the second end so that the second head is convex and extends away from the body, each of the second plurality of landings including a longitudinally outermost point, the longitudinally outermost points defining a second plane perpendicular to the longitudinal axis.