If you mean "Can I pour boiling water down the drain?" — short answer: usually yes for most household drains, but with precautions.
: Boiling water can melt or weaken the chemical adhesives (solvent cement) that hold pipe joints together, resulting in hidden leaks behind walls or under floors. boiling water down drain
experts generally advise against it due to the high risk of damaging modern plumbing systems If you mean "Can I pour boiling water down the drain