NOPE. Drano® will not damage pipes or plumbing.
Drano® products are powerful enough to dissolve nasty clogs, but they will not harm your plastic or metal pipes, so there’s no need to worry.
Be aware, however, there are other drain uncloggers on the market that could cause damage.
Avoid acidic chemical cleaners that contain sulfuric acid or hydrochloric acid, which can damage porcelain, metal and almost any other material when used incorrectly. Sulfuric acid is slightly less damaging to metal plumbing but can still damage aluminum, stainless steel and porcelain. These chemical cleaners should be used as a last resort—and only by a professional.
All Drano® products are safe and can be used with plastic pipes or metal pipes. Just follow the label directions so you can clear that clog safely.