10 Largest Plumbing Companies in USA

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7. FirstEnergy Facilities Services Group, Inc.

Revenue =$14 billion

Number of employees =16,000

FirstEnergy Facilities Services Group, Inc. provides services like heating, ventilation, plumbing, air conditioning, electrical, building control systems and many more. They own and operates more than 10 construction, energy management, and contracting companies.

Largest Plumbing Companies in USA

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