Greetings list, I'm impressed, I'm also in deep haddock's water judging by this list discussion on boilers and water. I'm about to have a nervous breakdown!
Why? I always leave water (distilled) a little, or a lot depending on how I end steaming on a particular day. My Aster Schools is nigh on thirty years old--should I turn it into the scrap yard??--it still runs O.K. Admitted, none of my locos are exposed to freezing temps. Then my friend has his 45 year old 3/4" scale loco that has always had water left in the boiler. --it is a fantastic runner. To the scrap heap, I guess. I sure am glad I run my trains, have fun. So while youall conjugate and worry, I'm off to fire up my Schools with it's "always" partly watered boiler. With fire and steam, Geoff--Burp!