A backflow preventer keeps water from an irrigation system or other connection from flowing back into the drinking water supply. About 56% of Cornelius homes were built since 2000, and lake homes are often large, with two water heaters and irrigation. Testing is required periodically, and outdoor assemblies need protection from freezes.
Testing and repair: backflow testing in Cornelius
How often is backflow testing required?
Utilities generally require testing when an assembly is installed and periodically after that, often annually; your water provider sets the schedule and the list of approved testers.
Can a failed assembly be repaired?
Often. Many assemblies can be rebuilt with replacement parts and retested rather than replaced.
Freeze protection: backflow testing in Cornelius
Outdoor assemblies left full in winter can freeze and crack. Drain or insulate them in fall, and test when the irrigation system is turned back on in spring.
Hiring for backflow testing in Cornelius
SteadWell is a free referral service, not a plumbing company. We connect you with an independent, licensed plumber who serves Cornelius; the plumber prices the job and stands behind the work. More about plumbers in Cornelius.
- Charlotte Water serves Cornelius; call 311 or 704-336-7600 for problems at the meter or in the street.
- Mecklenburg County Code Enforcement issues plumbing permits in Cornelius; water heater replacement needs one.
- Confirm the North Carolina license with the State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors.
- Get the trip fee and total price before work starts.




