Rafael Diaz
Owner · Licensed plumber · 40+ years in the trade
Owner of Hernandez Plumbing — family-owned Miami plumbers since 1972. Rafael brings decades of construction and service plumbing experience, from high-rise and new construction to cast iron replacement, leak detection, and expert consulting.
Rafael Diaz is a respected plumbing expert and senior leader at Hernandez Plumbing Company, serving South Florida since 1972. With more than 40 years of hands-on experience, he is known for technical depth, creative problem-solving, and field knowledge across residential, commercial, and large-scale construction work.
He joined the family business alongside his father-in-law, founder Pedro Hernandez, during Miami’s rapid growth in the 1970s—helping teach plumbing courses so others could pass the state licensing exam, then earning his own license and taking on major plumbing construction across the region as the city expanded.
Rafael specialized in plumbing for high-rise buildings, new homes, and large commercial and residential projects—experience that later made him a go-to expert witness and consultant in insurance and legal cases involving plumbing failures, water damage, and construction claims.
Since 2011–2012, he and his son Alejandro have focused on service plumbing, remodeling, cast iron replacement, water line repiping, and emergency response—bringing big-project judgment to homeowners. Rafael is especially known for leak detection, reroutes, and minimizing demolition while solving serious pipe problems. Today he remains a leading South Florida resource for cast iron pipe replacement: efficient work with as little disruption as possible, always standing behind the job.