Sewer pipe line repair in Washington

Western Washington's wet season keeps groundwater against sewer laterals for months, and side sewers under older Seattle-area homes are often clay or concrete with decades of root intrusion. Lining seals the joints and keeps the repair out of a trench that would fill as soon as it was dug.

What fails under Washington homes

Older Pacific Northwest neighborhoods were built with concrete and clay side sewers, sometimes with sections of Orangeburg (tar-impregnated fiber) pipe from the 1950s and 60s that has since deformed. Cast iron runs under the house; the side sewer to the street is often long and deep on hillside lots.

Wet ground for much of the year, big root systems from firs, cedars, and maples, and hillside soils that creep downslope all work on sewer joints. Groundwater makes open trenches slow and messy, and many side sewers run under sidewalks and streets that the city requires be restored to standard.

Lining handles the root-intruded clay and concrete; bursting replaces the Orangeburg and collapsed runs; both avoid digging up a wet hillside yard or cutting a city street.

Who covers Washington

Washington metro pages

These pages carry the local number and the installer for the metro.

• Sewer pipe lining in Seattle, WA

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