A one-way door for your sewer line.
A backwater valve closes automatically if wastewater flows backward from the street, protecting basements and low floor drains from sewer backups during storms.
- Typical timeline: One day
- Access: Floor cut or exterior cleanout box
- Valve: Normally open type with access cap
What it is, and why it matters.
When storms overload the sewer system, wastewater can flow backward through the lateral and come up the lowest drain in the house. A backwater valve is a flap inside the sewer line that allows flow out of the house and closes if flow reverses.
We cut into the line, usually in the basement floor or at an outside cleanout box, and install a valve with an access cap so it can be cleaned. A Nashville home with a basement bathroom, a floor drain or a history of backups is a typical candidate. The valve needs a periodic check to make sure it moves freely, and we show you how.
Four things done right.
Closes on its own
A flap shuts when wastewater flows backward.
Serviceable
An access cap lets the valve be cleaned and checked.
Right location
Placed where it protects the lowest fixtures.
Permit-aware
We explain local rules and handle paperwork when needed.
From first call to backwater valve installation.
- 01
Plan the location
Find the best spot on the lateral.
- 02
Cut into the line
Open the floor or yard and cut in the valve.
- 03
Install and test
Set the valve, cap and test the flow.
- 04
Restore and teach
Patch the floor and explain the yearly check.
Backwater Valve Installation across Tennessee.
We do this work in 58 cities, from Nashville and Franklin to Memphis, Knoxville, Chattanooga and Johnson City.
Backwater Valve Installation: common questions
Does a backwater valve stop all backups?
It helps stop backups from the street, but not clogs inside your own line. During a closure, the house plumbing above the valve should not be used, since wastewater cannot leave.
Is a backwater valve required?
Some cities require or recommend them for certain properties. Local rules differ, and we explain what applies in your area.
How do I get a price for backwater valve installation?
Fill in the form or call or text 615-209-7643. We confirm what is involved and send a written price, and most properties get a free estimate visit.
Ready to talk about backwater valve installation?
A short visit, a camera when it helps and a written price. A real person calls back, usually the same day.