Why does sewage come up into a Syracuse basement?
Sewage comes up into a basement when the drain system cannot carry its flow, usually because a line is blocked or the public system is full during heavy rain. The lowest drain in a house is the first place the water shows.
A drain carries waste away by gravity. When a line is blocked by roots, grease, a collapsed section or debris, the flow has nowhere to go and it rises. The basement floor drain sits lowest in the house, so the water appears there before it appears anywhere else.
The city's own material on Onondaga Creek describes the creek channel as engineered for combined sewage and storm flows. Where a system carries both, heavy rain can fill the pipes and push water back toward the buildings that sit at the bottom of the line. That is one reason a backup can start during a storm rather than from a blocked fixture.
What does a crew do to clean up sewage?
A crew removes the standing sewage, takes out the solids and the soaked porous material, cleans and disinfects the hard surfaces, and dries the structure. Each step is recorded so the owner and the insurer can see what was done.
The technician wears gloves, eye protection, boots and, where the water is heavily contaminated, a respirator. The standing water is pumped into a holding container and carried off for proper disposal. Solids and soaked paper are bagged on site and removed.
Hard surfaces are cleaned with a detergent first, so the soil is lifted, and then treated with a disinfectant that is suited to sewage. Porous materials such as carpet, pad, the lower part of drywall and insulation are removed where they have taken on the water, because a cleaning cannot reach what is inside them.
- Protective equipment worn for every entry into the water
- Standing sewage pumped and carried off for disposal
- Solids and soaked material bagged and removed
- Hard surfaces cleaned, then disinfected
- Porous materials removed where the water has soaked in
- The room dried to readings and the readings logged
Can a sewer backup be prevented?
A backup can often be reduced by keeping drains clear, by avoiding fixture use during a storm and by having a backwater valve or a backup device assessed by a plumber. No method removes the risk entirely.
Running a lot of water through the house during a heavy rain adds to the flow in the line. Waiting until the storm passes before running the washer or the dishwasher can lower the risk of a backup at a basement fixture. Keep grease out of the drains and do not flush wipes or paper towels, which tangle in the line.
A plumber can assess whether a backwater valve or a standpipe is suitable for a particular house. The valve is installed on the sewer line and closes when the flow reverses. Whether a valve is needed or practical depends on the house and the line, so ask a plumber for an assessment rather than relying on a general answer.
What do you tell the insurer about a sewer backup?
Tell the insurer the time you found the water, where it came up, and what you saw. Photographs before cleanup and a written record of the readings are the most useful papers you can keep.
Backup is handled under different terms than many other water events. Some policies exclude sewer or drain backup unless a separate endorsement is held, and the wording of the policy decides. Read the policy before the claim, and ask the insurer to show the backup terms in writing.
Keep the crew's note, the readings, the list of materials removed and the invoices. The New York State Department of Financial Services is the state regulator for insurers, and questions about how a claim is handled can be raised with it.
How long does a sewer backup take to dry out?
Drying a sewer backup usually takes several visits over a few days, because the water has soaked into the wall base and the subfloor. The drying ends when the readings reach a dry level, not on a fixed day.
The first visit removes the water and the solids and starts the equipment. The second and later visits move the equipment, take new readings and decide whether another material must come out. A wall that reads wet at the base may need a section cut back to dry the cavity.
Odour is often the last thing to leave. A room that still smells after the readings are dry may need a second cleaning or a closer look at a cavity. The crew notes any area it could not reach.