Wilmington sewage backup cleanup

Many Wilmington houses connect to the street sewer through laterals laid generations ago, in clay tile or cast iron. Clay joints let tree roots in; cast iron scales and narrows from the inside. Over years, wipes, grease and roots build up until a heavy load, such as laundry day or a full house at the holidays, pushes waste back up the line. The first place it shows is the basement floor drain.

Heavy storms add a second cause. When rainwater gets into sanitary sewers through cracks and improper connections, the volume can overwhelm the system and push sewage back toward houses, a form of sanitary sewer overflow ^[2]. If your drain backs up only during big storms, that is a strong hint.

In a row of attached houses, basements share walls and sometimes share drainage. A backup in one basement can soak a shared wall and reach the house next door, and a blockage in a shared line can affect several homes. Tell neighbors early, and if you rent, tell the landlord in writing immediately. Each owner usually works with their own insurer, and the contractor will need access to both sides of a wet shared wall.

If roots or a sagging pipe caused the backup, a camera inspection shows whether the lateral needs repair or lining. If storms cause it, ask a plumber about a backwater valve, which closes when water flows back toward the house ^[3]. Keep wipes and grease out of the drains, disconnect any downspout or sump that empties into the sanitary sewer, and keep valuables off the basement floor.

Many homeowners policies do not cover sewer or drain backup unless a water backup endorsement was added. Report the loss, photograph everything, and keep the plumber's report of the cause. See working with your insurance adjuster.

Many Wilmington basements hold the laundry and sometimes a workshop, a bathroom or a bedroom. After a backup, the washer, dryer and water heater standing in sewage should be checked, and anything porous in a finished room is removed. Tools and metal items can usually be cleaned. Treat the whole basement at the level of the dirtiest water that reached it, even if the backup looked small.

For the full method, see sewage backup cleanup. For how sewage compares with other water, see water damage categories. For the city's housing and flood history, see the Wilmington area page.

Clearing the line and removing contaminated materials usually take a day or two. Drying follows, and in an old stone or brick basement it can run a week. Rebuilding waits until the cause is fixed, the basement is clean and readings confirm it is dry. During that time, the basement is off-limits and plumbing use may be limited until the plumber confirms the line is clear.

Sewage smell lingers in porous materials: a forgotten rug, the bottom of paneling, wood shelving on the floor, or residue in cracks of an old concrete or brick floor. Removing what the sewage soaked, cleaning hard surfaces and drying thoroughly clears it. A floor drain that is rarely used can also let sewer gas in when its trap dries out; pouring water into it refills the seal. If odor persists after cleanup, ask the contractor to check again.

Many Wilmington rowhomes and converted houses are rented. If you are a tenant and sewage comes up in the basement, tell the landlord or property manager right away, in writing if you can, and stop using the plumbing. Clearing the line and cleaning the building are normally the owner's job; your renters insurance may cover your own belongings.

If you must enter, wear rubber boots, heavy waterproof gloves and eye protection, and wash with soap and clean water afterward. Launder work clothes separately in hot water.