Sewer Backup in a Restaurant or Business: What to Do
Sewage coming up through floor drains, restroom fixtures or kitchen drains in a restaurant, shop or office. Here is what it usually means, whether it is an emergency and what to do now. One call connects you with a local crew, any hour.
A sewer backup in a restaurant or business means wastewater is coming up through floor drains, toilets or kitchen drains because a line is blocked or the sewer is overloaded. It is category 3 water and an emergency for any food business. Stop using water, keep staff and customers away, stop food service near the area, and call a plumber and a cleanup crew. One call connects you with a local crew.
Where This Water Usually Comes From
- Most common
Blocked building drain
Grease, food waste, wipes or debris in the building drain line make water back up at the lowest drain first, usually a floor drain or a kitchen floor sink. If it happens in dry weather while water is being used, the blockage is likely in your line.
- Cause 2
Overloaded sewer in heavy rain
In older combined systems, heavy rain can overload the sewer. A backup that starts during or right after a downpour, in several drains at once, points to the sewer side. Hartford, New Haven, Bridgeport and Norwich have combined sewers.
- Cause 3
Grease buildup in a kitchen line
Restaurant kitchen lines collect grease over time. Slow kitchen drains before the backup, and greasy, smelly water at a floor sink, point to a grease clog.
- Cause 4
Restroom branch blockage
A backup only at the restrooms, or water rising in a toilet when another fixture drains, points to a blockage in the restroom branch line.
Is It an Emergency?
Call now if
- Call now if sewage is on the floor of a kitchen, food prep or dining area.
- Call now if wastewater is still rising or more drains start backing up.
- Call now if sewage is near electrical outlets, equipment or panels.
- Call now if it has reached carpet, drywall, stock or other tenant spaces.
- Call now if staff or customers have walked through it and it is being tracked through the building.
It can usually wait a few hours if
- It can usually wait a few hours if the backup has stopped and only a small patch of hard floor is affected.
- It can usually wait a few hours if the area is closed off and no food or stock is nearby.
- It can usually wait a few hours if a plumber has cleared the line and drains are flowing.
- It can usually wait a few hours if the business is closed and nobody needs the space.
Still call today: hidden moisture keeps spreading while it waits.
What to Do Right Now
- 1Stop using water Tell staff to stop running sinks, dishwashers, toilets and washers, because every gallon down the drain can come back up.
- 2Clear the area Keep staff and customers out of the backup area, close it off, and stop food service anywhere near it.
- 3Protect people Anyone who must go near it should wear gloves and boots, and children and pets should stay well away. Wash hands thoroughly after any contact.
- 4Keep clear of electrical Do not step into sewage near outlets or equipment. Have power to that area cut from a dry panel by the building engineer or an electrician.
- 5Call a plumber A plumber can clear the blockage or tell you if the problem is on the sewer side. Ask them to note where the line was blocked.
- 6Call for cleanup Photograph the backup, the drains and anything it touched, set aside affected food and supplies, and call so a local crew can clean and sanitize.
How a Crew Finds the Source and Fixes It
A sewer backup cleanup starts with containment. The crew sets up barriers so contaminated water is not tracked into dining rooms, sales floors or other suites, and technicians wear protective gear. They extract the wastewater, then use moisture meters and thermal imaging to see how far it wicked into wall bottoms, under flooring, into cabinet bases and into neighboring spaces. In a restaurant they pay close attention to kitchen equipment bases, walk-in cooler areas and floor sinks. They also note where the water came up, which helps the plumber and the owner understand whether the problem is in the building line.
Because category 3 water is contaminated, the fix is removal plus cleaning, not just drying. Porous materials it touched, like drywall bottoms, carpet, pad and some cabinet bases, are usually removed. Hard surfaces such as tile, stainless steel and sealed concrete are cleaned and disinfected. Then dehumidifiers and air movers dry what remains, and odor control runs if needed. Clearing the line, repairing a broken pipe or adding a backwater valve is plumber work, and the crew coordinates so the business can reopen as soon as the space is clean and dry.
- 1
Contain the area
The crew sets barriers and walk-off zones so contaminated water is not tracked into dining rooms, sales floors, offices or neighboring tenant spaces during cleanup.
- 2
Extract the wastewater
Technicians in protective gear pull sewage off floors and out of floor sinks, drain pits and low spots, then bag solids and debris for disposal.
- 3
Remove porous materials
Drywall bottoms, carpet, pad, insulation and cabinet bases that sewage touched are cut out and bagged, because contaminated porous materials cannot be reliably cleaned.
- 4
Clean and disinfect
Tile, stainless steel, sealed concrete and equipment bases are scrubbed and disinfected, and the space is checked with meters for moisture left behind walls.
- 5
Dry and deodorize
Dehumidifiers and air movers dry what remains, odor control runs if needed, and the area is cleared for rebuilding and reopening once readings are normal.
How to Keep It From Happening Again
- Keep grease out of drains. Train kitchen staff to scrape plates into the trash and never pour fats, oils or grease down sinks or floor drains.
- Maintain the grease interceptor. Have the grease trap or interceptor pumped and cleaned on a regular schedule sized to how much the kitchen cooks.
- Have lines cleaned. Ask a plumber to clean building drain lines on a schedule, and to run a camera through the line if drains run slow or back up more than once.
- Ask about a backwater valve. In older city systems, a plumber can tell you whether a backwater valve on the building line makes sense for your property.
- Keep restrooms clear. Post signs asking customers not to flush wipes, paper towels or other items, which are a frequent cause of restroom line blockages.
What It Costs
Commercial category 3 cleanup runs $7 to $14 per sq ft, drywall flood cuts and replacement $2 to $6 per sq ft, and commercial flooring tear-out $1 to $3 per sq ft. Dehumidifiers add $60 to $150 per unit per day. The size of the area, how far the sewage wicked into walls and floors, and how much kitchen equipment has to be moved drive the price. General market ranges, not quotes.
How Long It Takes
Cleaning and drying after a commercial sewer backup usually takes a few days once the line is cleared. Rebuilding wall bottoms, flooring and cabinets adds more time, and a food business may need extra time before it can reopen.
Call (203) 555-0163Sewer Backup in a Restaurant or Business in Connecticut
Sewer backups are a known commercial risk in Connecticut cities with older sewers. Connecticut has four communities with combined sewer overflows: Hartford, which discharges to the Connecticut River, and New Haven, Bridgeport and Norwich, which discharge to Long Island Sound. In older combined systems, heavy rain can overload the sewers. For restaurants and shops in Hartford County, New Haven County, Fairfield County and New London County, a downpour plus a blocked or aging building line is a common setup for a backup, and the buildings are old: Hartford housing has a median year built of 1944 and Norwich 1957.
When you call, say where the sewage is coming up, how big the area is, whether a plumber is on the way and whether food areas are involved. We connect you with a local restoration pro who contains, cleans and dries the space so you can get back to business. Mention whether the kitchen is still running and whether other tenants share the drain line, since that changes how the crew contains the area.
Sewer Backup in a Restaurant or Business FAQs
What do I do if sewage backs up in my restaurant?
Stop using water, close off the area, stop food service near it and keep staff and customers away. Call a plumber to clear the line and call for a cleanup crew, because category 3 water needs contaminated-water cleanup, not just a mop.
Why is sewage coming up through my floor drain?
Either the building drain line is blocked, often with grease, wipes or debris, or the sewer is overloaded during heavy rain. A backup in dry weather while water is in use usually points to your own line.
Can I mop up a commercial sewer backup myself?
A very small spill on hard floor can be cleaned with protective gear and disinfectant, but anything that reached drywall, carpet, cabinets or a kitchen needs a crew. Porous materials that sewage touched usually have to come out.
How long will my business be closed after a sewer backup?
It depends on the size of the area and what got wet. Cleaning and drying usually take a few days once the line is cleared, and rebuilding plus any reopening steps for a food business add time.
Does a sewer backup smell go away?
It does once contaminated materials are removed, hard surfaces are disinfected and the space is fully dry. Odor that hangs on usually means wet or contaminated material is still behind a wall or under the floor.
Who do I call about sewer Backup in a Restaurant or Business in Connecticut?
Call (203) 555-0163 any time. Calls are answered 24/7 in Fairfield County, Hartford County, Litchfield County, Middlesex County, New Haven County, New London County, Tolland County, Windham County, and you are connected with a local crew that can find the source and dry it out.
Other Commercial Problems
- Stained or Dripping Ceiling TilesBrown rings on ceiling tiles, a tile sagging in the grid, or water dripping onto desks and store aisles.
- Leak Between Apartment or Condo UnitsWater coming through the ceiling from the unit upstairs, or a resident saying the neighbor below is getting wet.
- Water in a Mechanical or Boiler RoomWater on the floor around the boiler, water heater, pumps or tanks in a building mechanical room.
- Water From a Fire Sprinkler LineWater pouring or dripping from a fire sprinkler head or pipe, often after a freeze in an unheated area.
- Water Coming In at a Storefront or Loading DockRain or floodwater coming under the front door, through the storefront glass or across the loading dock floor.
Sewer Backup in a Restaurant or Business? Call Now.
Calls answered 24/7. One call connects you with a local crew to find the source and start drying.