Hello all, just looking for advice on back flushing a brazed PHE. Ive got a 60 plate that i believe to be fouled due to poor water quality. Its on my buddies outdoor wood boiler and he never conditioned the watwer two years ago, and it hasnt been shut down since the day we hooked it up. Im going to cut in some tees and install boiler drains, figure i could back flush into a bucket a solution of something. any help would be greatly apreciated.