When a line is described as structurally failed

What the common descriptions usually point at

These are the observations the words tend to be attached to. They are not definitions — no standard set exists — and a contractor using one of these words may mean something else entirely, which is worth asking about rather than assuming.

Cracked

A visible line in the pipe wall. Ranges from hairline to open. Whether it is passing water, and whether that matters here, are separate questions from whether it is visible.

Broken

Usually a crack that has opened, or a section where pieces have moved relative to each other. The word carries no information about how much of the line is affected.

Collapsed

Most often means the camera could not continue. That is a real and important observation, and it is not the same as knowing what is at that point — a blockage, a deformation, and a separation all stop a camera.

Offset

Two lengths of pipe no longer aligned at a joint. Small offsets are common and frequently long-standing; the question is whether this one is doing anything.

Bellied or sagging

A section sitting lower than the run either side, so water stands in it. Standing water on camera is visible; how much of it is a belly rather than normal residual flow is a judgement.

Root intrusion

Roots visible inside the pipe. They entered through an opening, so the question underneath is what the opening is — which is a different observation, and often not made.

Deteriorated or failing

A general characterisation rather than an observation. Worth asking what specifically was seen, at what distance, that supports it.

What to ask about a description before acting on it

Ask these of whoever used the word. The answers are what turn a characterisation into something a second contractor could check.

• Which of what you have described did you see, and which did you infer?
• At what distance from the entry point, and which entry point?
• How far did the camera travel in total, and why did it stop where it did?
• Was the line located from the surface, so that distance can be placed on the ground?
• May I have the full recording, not a still frame?
• What else could produce what you saw at that point?
• What would a second opinion need in order to check this?
• If we do nothing this month, what specifically are we accepting the risk of?

A camera stopping is an observation about the camera

It is a genuinely useful observation, and it is frequently reported as though it were an observation about the pipe. The recording establishes that the equipment could not continue past a point. What is at that point is a separate finding requiring a separate basis.

This matters because "collapsed" and "could not pass" produce different quotes. The first implies a length that must be replaced. The second is compatible with a blockage that clears, a deformation that lining could address, and a separation that could not. Asking which one was established is not scepticism; it is the difference between a proposal you can compare and one you cannot.

Severity is not the same as scope

A serious condition at one location, with the rest of the line inspected and unremarkable, is a different project from the same condition with most of the run never reached. The description is identical in both cases. The proposals should not be.

When a quote covers substantially more of the line than anyone has looked at, the extra length is being priced on an assumption. That assumption may well be reasonable — but it should be stated, so it can be discussed, rather than carried silently inside a total.