How To Conduct a Scratch Test and What To Look For When Identifying Material Types

Inspect the section of piping where the water service comes through the foundation wall and connects to the water meter. The water service is most likely to be visible in the basement.

    Lead Water Service:

    • Dull grey colour
    • Scratch test reveals shiny underlying metal
    • Non-magnetic
    • A bulb formation might be seen along the pipe near the connection to the water meter
    • Pipes tend to be larger in diameter

     

    Copper Water Service:

    • Green corrosion may be seen along the pipe
    • Scratch test reveals shiny underlying copper metal
    • Non-magnetic
    • Pipes are relatively small in diameter

     

    Galvanized Iron Water Service:

    • Dull grey in colour
    • Will remains dull grey when scratched.
    • Magnetic
    • Threads may be present at the connection point

     

    Brass:

    • Threads may be present at the connection point
      • Similar colouration to copper

     

    To be considered in the PLWSRP, submitting evidence of a lead service is required. If you are having issues determining the composition of your private water service, a licensed plumber or home inspector can help you determine the material type.