Describe a difficult residential plumbing problem you encountered and explain how you resolved it.

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    Sample interview questions: Describe a difficult residential plumbing problem you encountered and explain how you resolved it.

    Sample answer:

    Difficult Residential Plumbing Problem:

    I encountered a challenging plumbing issue in a residential property where multiple drains in different parts of the house were frequently clogging. The homeowners reported experiencing slow drainage and occasional backups in sinks, showers, and toilets.

    Troubleshooting and Diagnosis:

    1. Inspection: I began by conducting a thorough inspection of the plumbing system, paying close attention to the affected drains. I checked for visible signs of leaks, corrosion, or obstructions.

    2. Video Camera Inspection: To further investigate the issue, I used a video camera inspection tool to examine the interior of the pipes. The camera revealed a significant buildup of grease and debris, as well as a partially collapsed section of the main drain line.

    3. Root Intrusion: Upon further examination, I discovered that tree roots had infiltrated the sewer line, causing damage and restricting the flow of wastewater.


    1. Drain Cleaning: I used a specialized drain cleaning machine to clear the obstructions from the affected drains. The machine’s powerful water jets effectively dislodged the grease, debris, and tree roots, restoring proper drainage.

    2. Pipe Repair: To address the collapsed section of the main drain line, I recommended replacing the damaged section with a new PVC pipe. This involved carefully excavating the area around the damaged pipe, removing the old section, and installing the new pipe with proper fittings and seals.

    3. Root Treatment: To prevent future root intrusion, I applied a chemical root killer to the area around the repaired pipe. This solution targets and kills tree roots, preventing th… Read full answer


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