Posted by Harold Kestenholz - Hydronic Network on July 20, 2000 at 12:20:40:
In Reply to: Acid Cleaning posted by Sean Meehan on July 20, 2000 at 11:23:58:
Feeling safe while acid cleaning is always a toss-up. The acid eats at the base calcium and magnesium, but also the metal. Physically cleaning with brushes and even high pressure water removes some metal. It is a matter of asking how much damage will the metal stand without requireing replacement. When the time comes for retubing - that is the result of the game. Comiserating isn't a great help, but it is better than empty promises and not being noticed.