Hydro- jetting basics please help

[baird1971]

I am trying to figure out the general rule of thumb about hydojetting, what pressure and gpm (Gallons per minute) to use on different materials. PVC, clay,terra, cement,cast iron etc. I can't find anything online. Especially de-scaling cast iron. Can anyone help please

 

[johnjh2o]

To d-scale cast iron you would be better off with a power snake with a cutter blade close to the ID of the pipe.

John

 

[baird1971]

Thanks for tip,Any other answers to the full question?