Boiling Water Down Drain Best — Best & Verified

Whether boiling water harms your plumbing depends entirely on the material of your pipes. While older homes may feature metal plumbing, modern residential systems rely heavily on plastics. 1. Melting and Warping PVC Pipes

When boiling water hits a plastic pipe, the intense heat instantly softens the synthetic material. Under the weight of the water and the structural pressure of the house, the softened pipe can warp, sink, or lose its perfectly sloped shape. Once a drain pipe loses its slope, water and debris will pool in the warped sections, creating chronic, recurring clogs. 2. Melting Joint Adhesives boiling water down drain