Why Is My Water Heater Making a Loud Popping or Knocking Noise? (Mineral Scale Breakdown)

Caleb Horner

Published on: 17/07/2026

If your water heater is making a loud popping or knocking noise, mineral scale and sediment may be cooking on the tank bottom. Learn what it means, how flushing helps, and when to call MH Plumbing in North Metro MN.