Pipe lining builds a new pipe inside the old one, so the old pipe matters. A line with cracks, leaking joints, or root entry points can be a good candidate. A line that has lost its shape usually is not. The answer comes from a cleaned line and a camera inspection, not from the symptoms alone.
FIELD NOTE
What Lining Needs From The Old Pipe
In cured-in-place lining, a resin-saturated liner is placed inside the existing pipe and cured to form a new pipe within it. The liner takes the shape of the pipe around it. That is why the host pipe needs to be continuous and reasonably round along the section being lined.
Cracks, separated joints, small holes, and places where roots have pushed in are the kinds of defects lining is meant to address. If those defects sit in a pipe that otherwise holds its shape, lining may be worth discussing.
FIELD NOTE
What Can Rule It Out
A section that has collapsed, a joint that is badly offset, or a sag that holds standing water is often not a lining candidate. A liner would follow the collapse or the low spot instead of correcting it. Those sections may call for pipe bursting or an excavated repair.
Keep in mind that the finished pipe has a slightly smaller inside diameter, and that branch connections inside the lined section need to be reopened after curing. Ask how those details apply to your line.
FIELD NOTE
How The Answer Is Reached
The line is cleaned first so the camera can see the pipe wall, then inspected along the accessible route. The inspection locates defects, measures the affected section, and shows where branches tie in. Heavy roots or scale can hide problems until they are removed.
Ask the person reviewing the footage to show you the sections that make lining suitable or unsuitable. A clear answer should name the section, the access point, and the reason another method might be better.
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