Seeing inside your walls: The high-tech way to diagnose plumbing

How to Diagnose a Main Plumbing Stack | This Old House · 4:22 · Video: This Old House · Watch at the source

In short: When a home's main plumbing stack fails, guessing is expensive. Watch as expert Richard Trethewey uses specialized camera technology to inspect the hidden infrastructure of a historic Detroit house.

In this segment from This Old House, plumbing and heating expert Richard Trethewey demonstrates how to identify major blockages in a home's main plumbing stack. By snaking a camera down the line at the Russell Woods house in Detroit, he provides a visual diagnostic of the pipes leading toward the street.

The video serves as a masterclass in modern home maintenance, showing how technology can demystify complex systems. It highlights the importance of professional-grade inspection to protect a home's infrastructure and ensures homeowners know exactly what questions to ask when hiring contractors.

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