Why is sewage water handled differently from a clean water leak?
Sewage water carries bacteria, viruses and waste, so it is a health hazard and must be handled with protective equipment. Materials it touches cannot always be cleaned to a safe standard, so more has to be removed. Clean water leaks can usually be dried in place, but sewage often cannot.
A clean water leak from a supply line is a question of moisture. A sewage backup is a question of contamination as well as moisture. The water can carry pathogens that stay on surfaces, and porous materials hold them in a way that makes them difficult to clean. That is why the decision about what to keep is different.
Protection comes first on these calls. The crew wears gloves, boots, eye protection and whatever else the job calls for, and it limits the spread of the water by isolating the area. Anyone in the house who is not part of the cleanup should stay out of the affected rooms until the work is finished.
What affects the scope of a sewer backup cleanup?
The number of fixtures involved, the depth of the water, the materials it touched and how long it stood all change the scope. Porous materials that stood in sewage usually have to come out. Each decision is explained on site before the work starts, and no dollar figure is given here.
The fixtures involved set the reach of the water. A single floor drain may affect only the area around it. A backup through several fixtures, or through a main line, affects more of the lower level and usually more materials.
Materials decide most of the rest. Carpet, pad, insulation, paper-faced drywall and some stored items that stood in sewage usually cannot be made safe and have to be removed. Hard surfaces such as sealed concrete or tile can often be cleaned and sanitized. The crew sorts each item and records its decision.
- Number of fixtures and drains that backed up
- Depth of water and the area it reached
- Porous materials that stood in the water
- Hard surfaces that can be cleaned and sanitized
- Stored contents that cannot be kept after contact with sewage
Can I clean up sewage from a basement myself?
It is not recommended. Sewage carries hazards that need protective equipment and a safe method of disposal. A homeowner who cleans it without protection risks exposure, and a cleanup that leaves contaminated materials in place can cause a problem later. A crew should handle the water and the removal.
Even a small backup can carry hazards that a household cleaner does not address. Water splashed onto hands, face or clothing, or breathed in as spray, is a risk. Carpet and pad that have soaked up sewage hold the contamination and release it when disturbed.
The safe steps before a crew arrives are the same as the steps for any hazard: keep people and pets out of the area, shut the door, stop running water into the house and wait. A crew can then remove the water, the solids and the materials that cannot be kept.
How do I prevent a sewer backup in the future?
A backwater valve on the sewer line, clear drains, careful use of the lowest fixtures during heavy rain and a plumbing check of the line can reduce the risk. The right fix depends on where the blockage or outflow problem is. A plumber should advise on a valve or a line repair, because that work is outside a cleanup.
Heavy rain is one common trigger for a backup that comes up through a low drain. Limiting water use during a storm, such as running the washing machine or the dishwasher, reduces the load on the line while it is under pressure. Drains that are slow should be cleared before a storm rather than during one.
A backwater valve is a device that lets water out of the house while stopping it from flowing back in. Whether one is appropriate depends on the building and the sewer connection, and a plumber can advise. The cleanup crew can note the conditions it saw on the call, which the plumber may find useful.
- Avoid running heavy water use during a storm
- Clear slow drains before the wet season
- Ask a plumber about a backwater valve for the lowest drains
- Keep records of when backups happen and what the weather was