Back-flow Devices
Back-flow Devices | Commercial Plumbing | Plumbing | Charleston
When Charleston businesses need to safeguard their potable water lines, they turn to HEP for cutting-edge back-flow prevention. Our certified technicians inspect, install, and maintain RPZ assemblies, double-check valves, and pressure vacuum breakers that meet local codes and insurance mandates. Each service visit includes digital reports and real-time compliance updates, so you never have to worry about unexpected shutdowns or fines.
From bustling restaurants on King Street to expansive industrial sites along the Cooper, we know every minute of downtime hits your bottom line. HEP’s rapid-response team arrives fully stocked, delivers same-day testing results, and backs every repair with a rock-solid workmanship guarantee. Put simply, we keep Charleston’s water clean, your patrons safe, and your operations flowing—raising the bar for commercial plumbing excellence.
FAQs
Why do commercial properties in Charleston need backflow prevention devices?
Charleston’s public water supply is protected by local ordinances and South Carolina Department of Health and Environmental Control (DHEC) regulations that require commercial facilities to install approved backflow prevention assemblies. These devices stop contaminated water—caused by back-siphonage or back-pressure—from flowing back into the municipal water lines. Restaurants, medical offices, manufacturing plants, and any building with fire-sprinkler or irrigation systems pose higher cross-connection risks, so a properly sized and tested backflow preventer is essential for public health and regulatory compliance.
What types of backflow preventers are most common for commercial plumbing applications in Charleston?
The three assemblies most frequently specified are (1) Reduced-Pressure Principle Assemblies (RPZ/RP), ideal for high-hazard applications such as chemical processing or food service facilities; (2) Double Check Valve Assemblies (DCVA), used for moderate-hazard situations like standard office buildings or apartment complexes; and (3) Pressure Vacuum Breakers (PVB) often installed on dedicated irrigation lines. Selection depends on the hazard level identified during a cross-connection survey, Charleston Water System requirements, space constraints, and downstream pressure needs.
How often must backflow devices be tested in Charleston, and who can perform the test?
Charleston Water System mandates that all commercial backflow prevention assemblies be tested at least once every 12 months—and immediately after installation, repair, or relocation. Only state-licensed backflow testers who hold a current Charleston Water System certification can perform the procedure. Test results must be submitted electronically or on the approved form within 30 days of the test date to remain in compliance and avoid fines or service interruption.
What is involved in a commercial backflow preventer test and certification?
A certified tester will shut off water, connect a differential pressure gauge, and verify that check valves and relief valves meet the specified closing and opening pressure criteria. The technician documents readings, inspects for leaks, seals, or corrosion, and makes minor adjustments if permissible. A passing test yields a signed certification tag attached to the assembly and a detailed report sent to Charleston Water System. If the device fails, the tester will recommend repairs or replacement and schedule a prompt retest.
Can an existing plumbing system be retrofitted with a backflow preventer, and what does installation entail?
Yes. A site evaluation identifies the main service line or branch lines requiring protection. The plumber will obtain any permits, shut down water service, cut a section of pipe, and install the correct backflow assembly with unions or flanges for future servicing. Proper clearances, drain piping (for RPZ relief discharge), and freeze protection are observed. After installation, the assembly is tested and the results filed. Most commercial retrofits can be completed in one business day, minimizing downtime for tenants or operations.
What are the consequences of not installing or maintaining a backflow device in Charleston?
Non-compliance can lead to cross-contamination of the public water supply, posing serious health hazards. From a regulatory standpoint, Charleston Water System may issue written notices, impose daily fines, or disconnect water service until devices are installed or tested. In the event of contamination, businesses can face civil liability, costly cleanup, and damage to their reputation. Regular installation, annual testing, and timely repairs safeguard customers, employees, and the broader Charleston community while keeping your business in good standing with local authorities.