What about galvanized pipe?
All ScaleBlaster units can work on galvanized pipe, however the area where you wrap the signal cable cannot be a magnetic – like galvanized. A handyman or plumber will need to replace a 6-8” area of pipe this with either PVC or copper pipe. This is not a difficult job. The rest of the pipe downstream of this can remain galvanized and the unit will work fine. We are only concerned at where you wrap the coil at.