Commercial plumbing covers the systems behind restaurants, offices, retail, medical spaces and multifamily buildings: heavy-use drains, larger water heaters, grease interceptors and required backflow assemblies. In Winston-Salem, owners also have to keep up with the utility's annual backflow testing and get permits through the joint City-County Inspections Division. Call the number on this page to be connected with a local plumber in Winston-Salem who handles commercial work.

How commercial work differs from a house call
A business has more fixtures, more people using them, and more cost when something stops working. Lines are larger, water heaters are bigger or there are several of them, and many buildings have equipment a home never has, such as grease interceptors, mixing valves, booster pumps or fire sprinkler connections. Repairs often have to be scheduled around business hours to avoid closing the doors.
Common commercial requests
- Main line and kitchen drain stoppages, often from grease
- Commercial water heater repair and replacement
- Restroom fixtures, flush valves and touchless faucets
- Backflow assembly testing, repair and installation
- Leak detection in multi-unit and mixed-use buildings
- Rough-in and fixture work for a tenant build-out
Backflow rules for businesses
Winston-Salem/Forsyth County Utilities runs a cross-connection control program that requires property owners to install, test and maintain backflow assemblies on every cross-connection. For commercial properties that generally means annual testing by a utility-approved tester, with results filed through BSI Online. The three-year cycle under NC Senate Bill 166 applies only to eligible residential irrigation, not to business connections.
Permits and build-outs
The City of Winston-Salem's Inspections Division is a joint City-County agency, and it also covers unincorporated Forsyth County and several nearby towns, including Clemmons, Lewisville and Rural Hall. Permits are applied for electronically. Tenant improvements, new fixtures and water heater replacements commonly need a permit and inspection, and a new backflow assembly requires one as well.
Keeping drains moving
Most of the city's wastewater flows to two treatment plants, Archie Elledge and Muddy Creek, through roughly 1,825 miles of sewer. Grease, wipes and solids from businesses cause many of the stoppages that back up into dining rooms and restrooms. Scheduled drain cleaning, interceptor upkeep and occasional camera inspections cut down on surprise shutdowns.
What affects commercial pricing
Price depends on the size and age of the building, pipe sizes and access, whether work has to happen after hours, permit requirements, and the specific equipment involved. Planned maintenance usually costs less than responding to failures as they happen, and it gives you more control over when the work disrupts customers, tenants or staff.
Commercial Plumbing questions from Winston-Salem homeowners
Do businesses in Winston-Salem need yearly backflow testing?
Who issues commercial plumbing permits?
Can plumbing work be done outside business hours?
What causes most restaurant drain backups?
Related plumbing services in Winston-Salem
Helpful guides
Commercial Plumbing in nearby cities and towns
Forsyth County
Davie County
Davidson County
Rowan County
Sources
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