The water heater that is in there now is a sealed combustion unit. I want to replace it with http://www.homedepot.com/p/GE-40-Gal-Tall-6-Year-36-000-BTU-Natural-Gas-Water-Heater-GG40T06AVG01/100013742?N=c1tz#.UlrzUSR4MhM
Attached are some pictures also note that the tank is leaning due to the...