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Plumbing

Tailored Commercial Plumbing Solutions to Meet Your Unique Needs & Challenges

Offering Commercial Plumbing solutions for Massachusetts, Rhode Island and Southern New Hampshire. Solutions that work for your business, not one-size-fits-all fixes—that’s why we design every service to fit your specific challenges, ensuring efficiency, reliability, and peace of mind.

Commercial Plumbing Solutions Designed Around Your Needs

You need a plumbing system that works seamlessly—no disruptions, no surprises, just reliable performance that keeps your business running smoothly.

Whether you’re managing a research lab, medical facility, university, retail space, or high-rise building, your operations depend on plumbing that meets strict standards and specialized requirements.

At Harold Brothers, we make your challenges our priority, delivering expert solutions that ensure efficiency, compliance, and peace of mind.

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Expert Installation & Maintenance

You get top-tier plumbing services designed for long-term reliability, so you can focus on what matters most—your business.
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Custom Solutions for Specialized Facilities

Whether you need lab waste treatment, medical gas systems, or high-purity water solutions, we tailor our services to fit your exact needs.
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Ongoing Support & Rapid Response

From backflow prevention to emergency repairs, you have a trusted partner ready to keep your plumbing system running smoothly.

Specialties

Basic Commercial Plumbing

Lab Waste Treatment Systems

RODI Systems

Medical Gases

Lab Gases

Lok-Ring

Pipe Freezing

Drain Cleaning

Backflow Services

Replacements

Water Heater Services

Start-up And Commissioning Services

Post Construction Warranty Service

What Our customers are saying

“Harold Brothers Mechanical Contractors is my trade partner of choice with both plumbing and HVAC scopes of work. Execution and delivery are always at a very high level. Their winning culture is driven down from both Patrick and John – The Best.”

Sean Edwards, VP Operations - Suffolk Construction

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Cape Cod Hospital- Cancer and Cardiology

Harold Brothers – Your Trusted Plumbing Partner

Harold Brothers is the team that gets it right the first time. We don’t just install plumbing systems; we engineer solutions tailored to your exact needs, ensuring reliability, efficiency, and compliance. Whether it’s complex lab waste systems, medical gas installations, or large-scale commercial plumbing, we handle the challenges others won’t—so your facility runs smoothly without unexpected disruptions.

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