1.) If it's a water leak in your unit - shut off the water valve for your unit. It is located in the utility closet above the water heater. One of the 3 valves there shuts off water for your entire unit.
2.) If it's a water leak in the unit above yours - contact your neighbor and have them follow procedure #1. If your neighbor is not home, shut off the water to your building using the main shutoff valve near the water meter in front of each building. These are usually located under or near the entrance walkway ramps. Then notify the Management Company - follow their telephone instructions for after hours service.
3.) If it's a sewer backup - shut off the water to your building using the main shutoff valve near the water meter in front of each building. These are usually located under or near the entrance walkway ramps. Then notify the Management Company - follow their telephone instructions for after hours service.
Use the Better Business Bureau website to search for Plumbers.
Check to make sure the company has a license from the South Carolina Department of Labor, Licensing & Regulation (http://www.llr.state.sc.us/). Check under the "Contractors-Commercial" AND "Residential Builders" category to confirm that the contractor is currently registered as required by state law. Many contractors and even the BBB website, indicate that a contractor is registered when in fact, the registration has lapsed.