Personally, I would expense the water heater as de minimis (under $2500 or 2% of the cost of the property), depreciate the refrigerator as an appliance, with bonus depreciation or 179 available , and capitalize the flooring as a restoration. I would not have used 179 on a structural component like a roof.
However i an not an expert on rental property and did not look up cites for any of this, so someone else may know more and give you a better answer.