Washing grease down the drain is the number one cause of cast iron degradation.
You should descale your cast iron plumbing pipes when your pipes show signs of corrosion. In residential use cast iron pipes should last 50 to 75 years.
Cast iron pipe descaling uses a specialized machine with a high speed rotating cable. This process makes it possible to scrape away build-up from the inner walls of a cast iron pipe. AAJDS’s customers gets a free video inspection after the job is done. Cast iron pipe descaling most often prologs the life of the cast iron pipe.