For Drain Cleaning ((link)) | Hydrochloric Acid

If you have older galvanized steel, copper, or iron pipes, hydrochloric acid can corrode the metal itself, leading to pinhole leaks or structural failure.

Hydrochloric acid is a "nuclear option" for drain cleaning. While it is incredibly effective at removing mineral buildup and tough organic clogs, the risk of pipe damage and personal injury is high. For most household clogs, mechanical removal or safer enzymatic cleaners are the better choice. hydrochloric acid for drain cleaning