Protecting Your Home from Costly Hidden Water Damage Water leaks, especially those hidden behind walls or beneath the slab, can lead to mold growth, structural damage, and astronomical water bills. Flynn Plumbing & Mechanical LLC specializes in non-destructive water leak detection using advanced sonic and thermal imaging equipment. This precision allows us to pinpoint the exact location of pinhole leaks, pipe bursts, and mainline issues with minimal disruption to your Sumner, WA home. Once located, our team performs durable, efficient pipe repairs using certified materials.