Sewer Line & Stack Repair
Every fixture in the building eventually arrives at one pipe. When that pipe fails, it is not a plumbing inconvenience, it is a capital decision.
Two different pipes, two different problems
| The waste stack | Vertical, inside the building, serving every apartment on the line. Cast iron in anything pre-war. Fails at the joints and at the base, where the vertical turns horizontal and the flow hits hardest |
|---|---|
| The house drain | Horizontal, in or under the cellar floor, carrying the whole building to the street. Cast iron or clay. Fails by losing its bottom, by a joint dropping, or by a section collapsing |
What tells you it is the drain and not a blockage
- Repeat backups at the lowest fixture in the building, clearing then returning
- Waste appearing at a cellar floor drain when an upper floor is used
- A persistent smell in the cellar that cleaning does not touch
- Damp or subsidence in the cellar floor along the run of the pipe
- Rust staining and weeping at the base of a stack where it turns
None of these are diagnostic on their own. All of them are reasons to put a camera down before anyone quotes anything.
The options, cheapest first
- Clean and reassess. Sometimes what looks like structural failure is a century of scale. Jetting and a second look costs a fraction of a replacement and occasionally ends the conversation.
- Spot repair. One failed joint or one cracked section, cut out and replaced. Viable when the rest of the run surveys as sound.
- Lining. A resin liner cured in place inside the existing pipe, forming a new pipe within the old one. Avoids breaking the cellar floor. Depends entirely on the host pipe being continuous and roughly round, which the camera decides.
- Replacement. Cutting the floor and putting in new. The most disruptive and the most definitive. For a stack, it means access on every floor it passes.
Replacing a stack in an occupied building
This is the one that needs planning rather than scheduling. The stack runs through the same corner of every apartment on the line, usually behind a bathroom wall. Every one of those apartments needs to be opened, and the line is out of use while the work is in progress.
What makes it go well is settled in advance: access arranged apartment by apartment rather than negotiated on the day, a realistic shutdown window agreed with the building, and a clear sequence so residents know which days affect them. What makes it go badly is discovering on a Tuesday morning that the apartment on five is away for a month.
Where a defect lies outside the building line, the job stops being plumbing alone. Opening the roadway in New York City requires city permits and coordination with more than one agency, and it runs on their timetable rather than yours. If the camera puts the problem out there, we will say so and tell you what route the job has to take.
Need this doing?
Call and describe the problem. You will get the price before anyone starts.