Some homes use CPVC (Chlorinated Polyvinyl Chloride) or traditional metal pipes like copper and cast iron. CPVC has a higher heat rating, usually around 200 degrees Fahrenheit, which is still lower than boiling water. While metal pipes won't melt or deform from a single pot of water, they are not entirely immune to issues. Rapid temperature shifts can cause metal to expand and contract quickly, putting stress on threaded joints and old seals. The Myth of the Boiling Water Clog Fix

Wait a few minutes for the heat to work, then pour a second pot. boiling water down drain

This guide explores the , safe methods , and risks of using boiling water in your plumbing. Why Boiling Water Works (Sometimes) Boiling water ( Some homes use CPVC (Chlorinated Polyvinyl Chloride) or

Most homes built after the 1970s use plastic piping (PVC for drains and vents; ABS for black plumbing pipe). While these materials are durable, they are not invincible. Rapid temperature shifts can cause metal to expand

For grease clogs, squirt a generous amount of grease-cutting dish soap into the drain before pouring the water. The soap helps emulsify the melted fats. Safer Alternatives for PVC Pipes