Start with the cause
Recurring backups need the right question: local clog, damaged branch, venting issue, or main-line condition? A useful evaluation connects the symptom to pressure, flow, drainage, venting, age, and access.
Questions for the scope
- What is being repaired or replaced?
- How will the area be accessed and protected?
- Are permits or inspections expected?
- How will the completed work be tested?
- Who handles finish restoration?
Trenton house context
Trenton’s housing ranges from compact 19th-century rowhouses and brick twins to early suburban homes and postwar streets. Useful plumbing planning considers shared walls, aging service lines, pressure, stacked fixtures, and the finish work surrounding every route.