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How to fix a drain overflowing with sewage water?

Follow our step-by-step guide to fix a drain overflowing with sewage. Learn safety tips, shut off the flow, clear clogs, sanitize, and prevent future issues.

Reviewed by Content Team

Head of Content, D. Gorenko

Updated June, 5

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How to fix a drain overflowing with sewage water?

 
Safety Precautions
 

  • Wear protective gear such as waterproof gloves, boots, face mask, and eye protection before approaching the sewage spill.
  • Avoid direct contact with sewage water to prevent exposure to harmful bacteria and contaminants.
  • Ensure proper ventilation in the area to minimize inhalation of any foul odors or toxic fumes.
  • If necessary, use a plastic barrier or cover to protect any open cuts or wounds.

 
Shut Off Sewage Flow
 

  • Locate the main sewer or sewage valve and shut it off to prevent further overflow.
  • If your property has a septic system, turn off the pump if possible to control the flow into the system.
  • Inform household members and ensure that no additional water is used until the issue is resolved.

 
Assess the Situation
 

  • Examine the affected drain to determine if the overflow is isolated (e.g., one sink or tub) or if multiple drains are impacted.
  • Identify any obvious signs of blockage, such as debris or buildup in accessible drain traps.
  • Determine if the issue is a result of a clog, a broken pipe, or a problem with the municipal sewer system.

 
Remove Standing Sewage
 

  • Use a wet/dry vacuum or a sump/pump to carefully remove the sewage water from the affected area.
  • Properly dispose of the removed sewage water in accordance with local health and safety regulations.
  • Ensure that the area is as dry as possible before proceeding to the next steps.

 
Inspect and Clear the Clog
 

  • Use a plumber’s snake or auger to gently probe the drain for any blockages. Insert the tool slowly and maneuver it to dislodge any obstructions.
  • If the blockage is shallow or in a sink or tub, try using a plunger to create a pressure difference that can clear the clog.
  • Avoid harsh chemical drain cleaners, as these can damage pipes and worsen the situation when dealing with sewage backups.
  • If the clog proves too stubborn or extends far into the plumbing system, consider renting a power auger for more effective clearing.

 
Clean Out the Drain
 

  • Remove any visible debris from the drain opening manually, taking care not to push the debris further down the pipe.
  • Flush the drain with a strong jet of hot water once the clog starts to break up, which can help clear lingering residues.
  • If accessible, inspect and clean out the P-trap underneath sinks or bathtubs to remove trapped waste and buildup.

 
Sanitize and Restore
 

  • After the drainage system has been cleared, flush the system with clean water several times to ensure proper flow and removal of any remaining debris.
  • Disinfect the affected area using a bleach solution or an approved disinfectant, following the manufacturer’s instructions for dilution and contact time.
  • Clean and dispose of contaminated cleaning materials and protective gear safely to prevent further spread of contaminants.

 
Prevent Future Overflows
 

  • Schedule regular maintenance and professional drain cleaning to keep the plumbing system free from debris buildup and blockages.
  • Avoid disposing of grease, paper towels, or other non-degradable items down the drain which can lead to clogs.
  • Consider installing backwater valves or check valves to prevent backflow of sewage in future incidents.
  • Regularly inspect your property’s sewage and drainage systems for early signs of wear or blockage, especially before heavy rainfalls or storms.

 

Notably, residents in areas like St. Louis and Nashville can benefit from routine inspections that help identify potential drainage issues early on.

 
Call a Professional
 

  • If the overflow persists or if the blockage appears to be deep within the system, contact a licensed plumber or sewage cleanup specialist immediately.
  • Provide the professional with a detailed account of the measures you have already taken, which can speed up the diagnosis and repair process.
  • Remember that persistent sewage issues can indicate larger problems such as pipe damage or issues with the municipal sewage system, which require expert attention.

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