A heavy summer thunderstorm rolls through Metro Detroit. The rain starts pounding the roof, water rushes toward the storm drains, and then you notice something you definitely do not want to see: water coming up through your basement floor drain.
For homeowners throughout Macomb County, Oakland County, Wayne County, and surrounding Southeast Michigan communities, a basement floor drain backup can be more than a messy inconvenience. It may be a warning that your home’s main sewer line is restricted, your sewer lateral is damaged, your sump or drainage system is struggling, or the municipal sewer system is being overwhelmed by a major rain event.
The key is figuring out where the water is coming from and why it is backing up.
At Drain Detectives, we help Metro Detroit homeowners diagnose drain, sewer, and basement water problems. If your basement floor drain backs up every time it rains, keeps happening after the line has been snaked, or is accompanied by sewage odors and problems with other drains, it is time to investigate the underlying cause.
Why Heavy Rain Can Cause Basement Floor Drain Backups
Your basement floor drain is one of the lowest drainage points in your home. That makes it one of the first places where a serious drainage or sewer problem may become visible.
Under normal conditions, wastewater from your sinks, showers, toilets, washing machine, and other fixtures flows through your home’s drainage system and eventually into the main sewer line.
Heavy rain can change those conditions quickly.
The City of Detroit Water and Sewerage Department notes that basements are particularly susceptible to flooding and that problems involving foundation drainage and residential sewer lateral lines can contribute to basement backups. Detroit has even established basement backup protection initiatives in neighborhoods with histories of backups during major rain events.
When large amounts of rain enter the drainage system in a short period of time, several different problems can cause water to appear around your basement floor drain.
1. The Municipal Sewer System May Be Overwhelmed
One possibility is a condition known as sewer surcharge.
During an intense storm, a sewer system can receive more water than it can immediately move. As the system fills, pressure increases.
If conditions are severe enough and your home does not have adequate backup protection, wastewater may be pushed backward toward your property. Because the basement floor drain is typically one of the lowest openings in the home’s drainage system, that is often where the problem becomes visible first.
This is one reason some homeowners experience basement backups almost exclusively during major rainstorms.
Detroit’s Water and Sewerage Department recommends measures such as properly managing downspouts and, where appropriate, installing backwater valves and sump pumps to help reduce the risk of basement backups.
You can read more from the City of Detroit’s Basement Backup and Flood Protection program.
2. Your Main Sewer Line May Already Be Partially Clogged
Heavy rain does not necessarily create the underlying plumbing problem.
Sometimes it reveals a problem that was already there.
Imagine a sewer line that should have its full diameter available for wastewater. Now imagine that same pipe partially restricted by:
- Grease and sludge
- Tree roots
- Mineral deposits
- Scale
- Wipes and other debris
- A shifted pipe joint
- A damaged section of pipe
- Years of accumulated buildup
The line may continue functioning during normal daily use because there is still enough room for wastewater to pass.
Then conditions change.
A storm arrives, drainage demands increase, and suddenly that partially restricted line cannot move water quickly enough. Water finds the lowest available escape point, which may be the basement floor drain.
If your basement drain has backed up more than once, professional drain cleaning may be necessary to restore proper flow.
3. Tree Roots May Be Restricting Your Sewer Line
Tree roots are another important concern, particularly in established Metro Detroit neighborhoods with mature trees and older underground sewer lines.
Roots naturally seek moisture. A small crack, deteriorated joint, or opening in an underground sewer pipe can provide exactly what they are looking for.
Once roots enter the pipe, they can continue growing.
The result can be a network of roots inside the sewer line that catches toilet paper, grease, wipes, and other debris. Eventually, wastewater has less and less room to pass.
Homeowners may initially notice:
- Occasional slow drains
- Toilets that gurgle
- A basement drain that bubbles
- Recurring main-line clogs
- Backups after heavy rain
- Problems that return shortly after the sewer was snaked
Drain Detectives discusses root intrusion and other sewer failure symptoms in our guide to the 7 warning signs your main sewer line is about to fail.
If roots are suspected, simply guessing at the problem is unnecessary. A professional drain camera inspection can provide a view inside the sewer line.
4. Your Sewer Lateral Could Be Damaged
The sewer lateral is the pipe carrying wastewater away from your home toward the public sewer.
Problems with this line can include:
- Cracks
- Broken sections
- Separated joints
- Root intrusion
- Collapsed pipe
- Severe corrosion
- Low or sagging sections
- Heavy buildup
These problems can reduce the amount of wastewater the pipe can handle.
During normal conditions, you may notice very little. During a downpour, however, a compromised drainage system may reveal itself through a basement backup.
The City of Detroit’s basement backup program includes CCTV inspection of residential sewer lateral service lines and, when a defect is identified, potential repair or replacement. That highlights just how important the condition of the private sewer lateral can be when investigating recurring basement backups.
Drain Detectives provides sewer cleaning and sewer line repair throughout Metro Detroit.
5. Your Sump Pump or Basement Drainage System Could Be the Problem
Not every puddle near a basement floor drain is a sewer backup.
This distinction is extremely important.
Michigan homes frequently deal with groundwater and foundation drainage issues after periods of heavy rain or snowmelt. If groundwater is entering the basement, the problem may involve the sump pump, drain tile, grading, foundation, discharge line, or another component of the property’s drainage system.
A sump pump may struggle because of:
- A failed pump motor
- Power loss during a storm
- A stuck float switch
- An obstructed discharge line
- A failed check valve
- An undersized pump
- Excessive groundwater
- Debris in the sump basin
If your sump pump is not operating correctly while water levels are rising, the situation can turn into a basement flood quickly.
Drain Detectives offers sump pump repair and installation throughout Metro Detroit.
If water is entering through the foundation or around the basement rather than backing up through the plumbing system, our basement waterproofing services may also help identify and address the source.
Is It Sewage or Groundwater?
One of the first things to determine is whether you are experiencing a sewer backup or water intrusion.
Signs pointing toward a sewer or drain problem can include:
- Strong sewage odors
- Dirty or discolored water
- Toilet paper or waste in the water
- Multiple plumbing fixtures backing up
- Gurgling toilets
- Water appearing when another fixture is used
- A floor drain that bubbles before overflowing
- Recurring drain problems before the storm
Groundwater intrusion may be more likely when:
- Water is relatively clear
- Water enters through foundation cracks or walls
- The sump pit is overflowing
- The sump pump is not operating
- Water appears along the basement perimeter
- There are no problems with toilets, sinks, showers, or other drains
Sometimes both issues can occur during the same storm, which is why diagnosing basement water based solely on where the puddle appears can be misleading.
What Should I Do If My Basement Floor Drain Is Backing Up Right Now?
If water is actively coming up from the floor drain, stop adding water to the plumbing system.
Do not:
- Run the dishwasher
- Start the washing machine
- Take a shower
- Continue repeatedly flushing toilets
- Run large amounts of water down sinks
If the main sewer line is blocked, every gallon sent down another drain has to go somewhere.
Next, check other fixtures.
Is the toilet gurgling?
Does the bathtub drain slowly?
Does flushing a toilet cause the basement floor drain to bubble?
Are several drains affected at once?
Multiple fixtures experiencing problems at the same time can be a strong indication that the issue is deeper in the main drainage or sewer system rather than an isolated floor-drain clog.
Our existing guide, What to Do If You Have Water Coming Up From a Basement Floor Drain, provides additional steps homeowners can take when a backup is actively occurring.
If sewage is entering the basement or water is rising quickly, Drain Detectives offers 24/7 emergency plumbing service.
Why Does My Floor Drain Only Back Up When It Rains?
This is an important diagnostic clue.
If the drain functions normally for weeks or months but backs up during intense rain, the timing suggests the storm is contributing to the problem.
That does not automatically mean the public sewer is solely responsible.
A partially obstructed private sewer line may have enough capacity during normal conditions but fail when the overall system is under greater stress.
Likewise, an existing drainage or foundation problem may only become apparent after the soil around the house becomes saturated.
That is why recurring storm-related backups deserve an inspection rather than repeatedly treating the symptom.
Why Does the Backup Keep Coming Back After Snaking?
A drain snake can be extremely effective for many blockages, but recurring problems deserve additional investigation.
Snaking may open enough of a blockage to restore flow without necessarily addressing heavy buildup along the pipe walls or identifying structural damage.
For certain sewer lines, hydro jetting may be recommended. Hydro jetting uses high-pressure water to remove grease, sludge, scale, roots, and other buildup from the inside of a pipe.
The right solution depends on the condition of the line.
That is another reason a camera inspection can be valuable. Instead of repeatedly clearing the same drain without knowing why it keeps clogging, a plumber can inspect the inside of the pipe and look for the underlying cause.
When Should You Consider a Sewer Camera Inspection?
A camera inspection can be especially valuable if:
- Your basement has backed up more than once
- The backup occurs whenever Metro Detroit receives heavy rain
- Several drains are slow
- Your toilets frequently gurgle
- You have large trees near the sewer lateral
- The sewer line has needed repeated snaking
- You recently purchased an older home
- You suspect a broken or collapsed sewer pipe
- You want to understand the condition of the line before approving a major repair
Oakland County’s Water Resources Commissioner also uses closed-circuit television equipment to inspect sewer pipes as part of its sewer maintenance operations.
A camera cannot prevent a storm, but it can help answer a much more useful question:
Is there something wrong with my sewer line that is making my home more vulnerable to backups?
Learn more about Drain Detectives’ sewer camera inspection service.
Can a Backwater Valve Help Prevent Basement Sewer Backups?
A backwater valve is designed to help prevent sewage from flowing backward through a home’s sewer connection.
Under normal conditions, wastewater leaves the home through the sewer lateral.
When sewer conditions cause flow to reverse toward the house, the valve is designed to close and help prevent that reverse flow from entering the home’s plumbing system.
Whether a backwater valve is appropriate depends on the home’s plumbing configuration and local requirements.
The City of Detroit specifically identifies backwater valves as one of the measures that can help reduce basement backup risks in appropriate properties.
If your basement has experienced repeated backups during major storms, ask a qualified plumbing professional whether a backwater valve makes sense for your system.
How Can Metro Detroit Homeowners Reduce Their Risk Before the Next Storm?
You cannot control how much rain falls, but you can address weaknesses around your own property.
Consider having recurring sewer problems investigated before they become emergencies.
Pay attention to early warning signs such as:
- Slow drains
- Gurgling
- Sewer odors
- Recurring clogs
- Basement drain bubbling
- Sump pump problems
- Water around the foundation
Keep gutters and downspouts working correctly and direct water away from the foundation where permitted. Detroit DWSD specifically recommends disconnecting downspouts from the sewer system and extending them away from the foundation where appropriate.
Have a sump pump tested before severe weather rather than discovering it has failed after the basement starts taking on water.
And if the main sewer has a history of clogs, consider having the line inspected and professionally cleaned before the next major storm.
Basement Drain Backups in Macomb County
Drain Detectives is based in Fraser and provides plumbing, drain, and sewer services throughout Macomb County, including communities such as Warren, Sterling Heights, Clinton Township, Shelby Township, St. Clair Shores, Roseville, Eastpointe, Macomb Township, Mount Clemens, and surrounding areas.
Older neighborhoods, mature trees, seasonal freeze-thaw cycles, and severe summer storms can all create challenging conditions for residential drainage systems.
Homeowners can explore our complete Metro Detroit service area.
Basement Drain Backups in Oakland County
We also provide sewer and drain services throughout Oakland County, including Troy, Royal Oak, Birmingham, Madison Heights, Ferndale, Southfield, Pontiac, Bloomfield Hills, and surrounding communities.
Oakland County provides specific guidance for residents who experience basement sewer backups. The county recommends first determining which government agency maintains the applicable sewer system by checking the sewer bill.
You can find additional information through the Oakland County Water Resources Commissioner’s basement flooding resources.
Do Not Wait for the Next Heavy Rain to Find Out
A basement floor drain that backs up once deserves attention.
A floor drain that repeatedly backs up whenever it rains is giving you a pattern.
The cause could be a restricted main sewer line, root intrusion, damaged sewer lateral, municipal sewer surcharge, sump pump problem, foundation drainage issue, or a combination of factors.
The goal should not simply be to get the water down the drain again.
The goal should be to determine why it came up in the first place.
Drain Detectives provides professional drain cleaning, sewer cleaning and repair, hydro jetting, drain camera inspections, sump pump service, waterproofing, and emergency plumbing throughout Metro Detroit.
Need Help With a Basement Floor Drain Backup in Metro Detroit?
If your basement floor drain is backing up, sewage is entering the basement, or the problem returns every time it rains, contact Drain Detectives.
Drain Detectives
18260 Malyn Blvd.
Fraser, MI 48026
Macomb County: (586) 296-0036
Oakland County: (248) 645-2448
Drain Detectives offers 24/7 emergency plumbing and drain service throughout Metro Detroit.
You can also request plumbing service online or browse the Drain Detectives plumbing blog for additional drain, sewer, and plumbing advice.
If water is actively backing up or sewage is entering your basement, stop using water in the home and call for emergency assistance.
