This replacement tank is not an exact replacement but will fit in the same location. You will need to reroute one of the top connections and the tank probe locations were moved over as that area of the tank was removed in the redesign.
Wall thickness is 0.180" in gray polyethylene
THE SEALED HOLE ON TOP OF THE TANK IS FROM THE MANUFACTURING PROCESS. IT IS A VENTING HOLE USED DURING THE CREATION OF THE TANK. IT HAS NO FUNCTIONAL USE FOR THE END-USER.