Yes. Heavy rain can cause sewer backups when storm water gets into sewer pipes through cracks, loose joints, open cleanouts or illegal downspout connections, overloading the lines. When the public main fills up, sewage can push backward into homes with low drains. Cracked private lines can also let groundwater in and back up on their own.
Sewer systems are designed to carry wastewater, not rain. When a big storm pushes extra water into them, the pipes can fill faster than they drain. That water has to go somewhere, and the lowest open drain in a nearby house is often the easiest path.
How Does Rain Get Into Sewer Lines?
- Cracks and loose joints in older private laterals and public mains let groundwater seep in.
- Missing or broken cleanout caps let surface water pour straight in.
- Roof downspouts or yard drains tied into the sewer line, which is generally not allowed.
- Flooded manholes in low areas.
Why Do Some Homes Back Up and Others Do Not?
Homes with drains sitting low compared with the street, the nearby manhole or the public main are most at risk, because backed-up water finds them first. Homes with cracked old laterals can also flood their own line with groundwater. In a flat town like Pine Bluff, with many homes near the lake, the river or low ground, storm-related backups are a real concern for some neighborhoods.
How Can You Tell If Rain Is the Cause?
- Backups happen during or right after heavy rain, and the drains work fine the rest of the time.
- Neighbors have similar problems during the same storm.
- A camera inspection on a dry day shows your line is clear.
- Or the camera shows cracks and open joints where groundwater gets in.
What Fixes Storm-Related Backups?
| Cause | Fix |
|---|---|
| City main overloads and pushes back | A backwater valve on your line |
| Groundwater leaking into your cracked lateral | Repair or line the pipe |
| Open or broken cleanout cap | Replace the cap |
| Downspout tied into the sewer | Disconnect and redirect it |
How Does a Backwater Valve Help?
It is a one-way valve on your sewer line. Wastewater flows out normally, but when the city side backs up, a flap closes and blocks sewage from coming into your house. It works best when your own line is in good shape. While it is closed, limit water use inside, since your own drains cannot empty until the city side clears.
Why Older Lines Make It Worse
Rain does not just overload the city side. Old clay and cast iron laterals with open joints act like a drain field in reverse: when the ground is soaked, groundwater seeps in through every gap. That extra water fills your own line and can back it up even if the city main is flowing. The fix for that is sealing or replacing the leaky pipe, and it has a second benefit: it also keeps roots out, since the same gaps let roots in.
What Should You Do During a Storm?
- Limit laundry, dishwashers and long showers during heavy rain.
- Keep drain plugs handy for low floor drains or showers.
- Report widespread backups to Pine Bluff Wastewater Utility at 870-535-6603.
See how to prevent a sewer backup, or learn how we approach sewer line repair in Pine Bluff.
Call and my crew will camera your line and tell you whether a backwater valve or a repair is the fix. 24/7.
FAQ
Does homeowners insurance cover rain-related sewer backup?
Usually only with a sewer or water backup endorsement. It is typically not covered by flood insurance or a standard policy alone.
Is it legal to connect my downspouts to the sewer?
Generally no. Storm water connections to sanitary sewers are prohibited in most places because they overload the system.
Will a backwater valve stop all backups?
It stops city-side backflow. It cannot help if your own line is blocked between the house and the valve.