Ok so we bought a log cabin a few months ago and I now find out from the previous owner that the water in the boiler was always brown. I asked him if he used corrosion inhibitor and he said yes. I dont even know why I asked him. So now I am looking for advice on the best way to flush the system before I fill it for the year. I dont even know where the drains are for this boiler so Im digging thru online manuals but they are generic for a number of different models. Any help would be appreciated.