The practice of pouring boiling water down a drain is a deceptive "quick fix" that often creates silent, long-term plumbing issues. While it can liquefy minor grease buildup, the extreme heat poses severe risks to modern plumbing materials. The Material Conflict
If you mean "Can I pour boiling water down the drain?" — short answer: usually yes for most household drains, but with precautions. boiling water down drain
This is where most people get into trouble. Boiling water can damage critical components of your plumbing system. The practice of pouring boiling water down a