Case Studies

Dirty brown water and poor water flow were the first clues that a Mid-Atlantic commercial property owner had a problem. Then the owner was put on notice by the local fire department that the water supply lines were no longer meeting the required flow requirements. Four hydrants on the owner's property were flowing between 200 to 300 gallons per minute—well below the 1,000 gallons per minute required by code. A section was inspected revealing the pipes were almost completely clogged with corrosion induced tuberculation.
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CAUSE Corrosion causes most pipe problems including reduced flow, bacterial growth, red/dirty water and ultimately, leaks and breaks. Corrosion can occur slowly or quickly depending on a myriad of variables including: Low or High pH, these can greatly accelerate corrosion Oxygen content is a primary facilitator of MIC (corrosion) Flow Rate - standing water shortens pipe life by promoting accelerated corrosion Temperature - higher water temperatures facilitate faster corrosion OPTIONS and CONCERNS The first option considered was traditional dig-and-replace. But the property enjoyed extensive, mature landscaping that the owner strongly wished to avoid damaging. The owner was very concerned about coordinating with other utilities, disrupting tenants and customers and insuring that future corrosion was prevented.…