Sewer Lining Services

Sewer lining (CIPP) cures a new, jointless pipe inside your existing sewer line — from a cleanout or one small pit — sealing the root-prone joints that make old clay and concrete back up. Pro Sewer Repair installs BlueLight UV-cured liners where the camera shows the line qualifies.

What is cured-in-place sewer lining?

Cured-in-place pipe (CIPP) lining rehabilitates a sewer from the inside. A resin-saturated liner is pulled into the old pipe, a bladder inflates it against the wall, and the resin hardens into a smooth, continuous pipe with no joints for roots to find. The old clay or concrete becomes the form; the liner becomes the sewer. It is often the answer for a common failure under Seattle-area houses: a clay line whose pipe is fine and whose joints are not.

What is BlueLight UV-cured lining?

BlueLight is the UV lining system Pro Sewer Repair uses for the small-diameter lines under houses. Instead of felt saturated on site and cured with hot water or steam, it uses a factory-impregnated fibreglass liner with a light-activated resin. After the liner is inflated, a train of LED lamps on a cable is drawn through it at a controlled speed with a camera on the head, and the technician watches the resin harden section by section. It is faster than a steam cure, uses no boiler or water, and gives a thinner, stronger wall. The BlueLight explainer compares the cure methods side by side.

When is lining the right fix, and when is it not?

• Right fix: clay or concrete with open joints, root intrusion at the joints, hairline cracks or minor offsets — a pipe that is still round and continuous end to end. Also cast iron under the slab that is scaled but intact.
• Not the fix: Orangeburg that has gone oval, a collapsed section, a bad belly (a liner follows the grade it is given), or a line that needs to be upsized. Those are pipe bursting or spot-repair jobs, sometimes both — a short excavation at the failed section, then a liner through the rest.

We do not decide from the curb. The camera inspection shows the material, the defects with distances and the grade, and the collapsed-line guide explains the line between "can be lined" and "has to be replaced".

How does a lining job go?

1. Camera and options. The inspection, then every method that fits, in writing, with scope, access, permit and, for full replacements, warranty.
2. Permit. Lining a side sewer in Seattle requires a side sewer permit from Seattle Public Utilities; elsewhere the city or district. Permit requirements are explained and built into your written scope.
3. Prep. The line is hydrojetted clean, roots are cut back, offsets ground smooth, scale removed, and the camera confirms the host is ready.
4. Install and cure. The liner goes in from a cleanout or one small pit, the bladder inflates it, and the LED train cures it under camera.
5. Finish and proof. Ends trimmed, branch connections reopened with a cutter, a final camera pass to show you the finished liner, and the written paperwork for your job handed over.

The camera work in steps 1 and 3 is described in how a sewer pipe crawler camera inspection system works.

How does lining affect roots?

A cured liner has no joints, which removes the entry points roots use in the lined section. Roots can still find any part of the line that was not lined, which is why we line to the property line or the main when the host allows and show you on camera exactly where the liner starts and stops. The trenchless overview puts lining next to bursting; how long a trenchless job takes explains what affects the timeline. For the background on how roots get in and how they are kept out, read how to prevent and remove root intrusion in sewer lines.

What affects the cost of sewer lining?

We do not publish a price range for lining. The cost is driven by the length of the run, its diameter, how much prep the host needs (root cutting, grinding offsets, descaling), how many branch connections have to be reopened, whether a cleanout exists or an access pit has to be cut, the permit, and restoration. A liner from an existing cleanout with a clean host is the simplest job we do; a line that needs a spot repair first and a liner through the rest is two scopes on one estimate — and you see both, in writing, before a price.

Lining and the Seattle side sewer permit

Lining a side sewer inside Seattle city limits is regulated side sewer work and needs a side sewer permit from Seattle Public Utilities, with the finished liner inspected — on camera — before the job is closed. The Seattle side sewer permit guide covers the process and what the permit record means for the next owner. Outside Seattle, the city or sewer district issues the permit; either way, permit requirements are explained and built into your written estimate.

Why Pro Sewer Repair for sewer lining?

Lining is one of the highest-skill jobs in sewer work — the prep and the cure are everything — and it is a core service here, not an add-on. Family-owned and sewer-first in Seattle since 2017, using BlueLight UV lining and HammerHead trenchless equipment. Every option on the screen before a number, free estimates and second opinions, a real person on the phone 24 hours a day, 365 days a year, and financing through Service Finance. Call (425) 478-3133 or request an estimate online.