Backwater valve cost in Columbus
A backwater valve stops sewage from flowing back into your basement when the public sewer backs up. Most homeowners pay $200 to $1,000 for the valve and installation, but in the City of Columbus you may not have to pay at all.
$200 to $1,000Typical cost for a backwater valve and installation, per HomeServe. Eligible Columbus homes may pay nothing through Project Dry Basement.
Check Project Dry Basement first
If you live in a single or two-family home in the City of Columbus and your basement has had a sewer backup, the City's Project Dry Basement program says it will cover the cost of an approved backflow prevention device. Report the backup to the 24-hour Sewer Maintenance Operations Center at 614-645-7102 and keep the service request number. Program questions: 614-645-8404. More on who qualifies.
| Item | Typical cost | Source |
|---|---|---|
| Valve and installation | $200 to $1,000 | HomeServe |
| Single-fixture valve, part only | $40 to $100 | HomeServe |
| Single-fixture valve, labor | $75 to $150 | HomeServe |
| Professional testing, yearly | $30 to $300 | HomeServe |
What moves the price
- One fixture or the whole line. A small valve on one floor drain is the cheap end. A valve on the main sewer line protects every drain in the house but usually means cutting the basement floor, so get it quoted in writing.
- Access to the pipe. Finished floors, tight spaces or a deep sewer line add labor.
- Permits. Plumbing work on the sewer line usually needs a permit. Ask whether the quote includes it.
After it's in
A backwater valve needs care to keep working. The City says valves installed through Project Dry Basement should be inspected and cleaned monthly, and that a loose lid can stop the alarm from sounding during a backup.
Water coming through the walls or floor instead of the drains? That's groundwater, and a backwater valve won't help. See sump pump costs instead.
Sources
Last checked November 3, 2026.