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34 Deforest Ave, #9

East Hanover, NJ 07936

Call Us

(973) 577-5123

Email Us

[email protected]

Reliable • Professional • Trusted

Residential & Commercial

Plumbing & Heating

New Jersey’s preferred Plumbing & Heating Professionals
delivering quality and excellence to every customer.

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8

30+ Years Experience

Master Plumber

Who We Are

Dependable Service, Start to Finish

Rooted in reliability and built on experience, we’ve proudly served communities across Northern New Jersey with unmatched dedication.

  • Licensed & Insured
  • Safety & Code Compliant
  • Affordable Pricing
  • Quick, Timely Services
  • Transparent Communication
  • Family-Owned
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What We Offer

Solutions For Every Property

plumbing pipes

Full-Service Plumbing Work

Traditional and tankless water heaters to expert drain cleaning and pipe repairs, we handle all your plumbing needs with reliable, expert service.

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Heating Systems & Conversions

From radiant heating systems to boilers, furnaces, and complete oil-to-gas conversions, we have you fully covered with expert service you can trust.

Heating Overview
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New Construction & Remodeling

Partnering with builders and homeowners to deliver expert plumbing and heating installations for new construction and remodeling projects.

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Water Line & Treatment Services

From underground water lines to filtration and softening systems, we provide quality work.

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Expert Gas & Sewer Line Solutions

From leak detection to complete replacements we ensure safe, code-compliant service.

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Routine Care & Maintenance

Reliable services that help avoid unexpected repairs and ensure system efficiency.

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Reviewed and Rated

Words from Satisfied Customers

"Excellent service!! Greg N on time extremely professional! Great job! I highly recommend William Diamond plumbing! I would never use any other company! Thanks for your great service!!"

Bette Wines Google - 5 Stars

"I got connected with Bill due to a plumbing issue I had from another company. He came to my house immediately and diagnosed the issue. He had a team fix it the next morning. It was impressive. I even had a follow up question the next week and he sent one of his guys out to resolve it the very next day. Would for sure recommend."

Jacob Svoboda Google - 5 Stars

"Excellent service!! Robert came in and tackled an extremely complicated project we had. He did it efficiently and with a smile. Highly recommend!!"

Michelle Perez-Vega Google - 5 Stars

“What I love about my job is being able to help my community through honest work. Our team always makes sure that we leave our customers smiling and happy.”

Bill Diamond

Why Choose Us

The Diamond Difference

Choosing the right team means peace of mind—our reputation is built on clear communication, dependable service, and a commitment to doing what’s right for every customer.

Our Vision

To lead with integrity, expertise, and a commitment to long-term customer satisfaction.

Our Mission

Build on trust, deliver with precision providing reliable, expert service that exceeds expectations every time.

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Our Process

Making Your Plumbing Problems A Pleasant Experience

We believe that plumbing problems don’t have to be stressful. From the moment you call to the moment the job is done, we’re committed to providing clear communication, courteous service, and reliable solutions that turn a frustrating situation into a pleasant experience.

Make Appointment

A member of our team will reach out to finalize the details.

We Arrive at Your Doorstep

…on time, ready to deliver quality workmanship with care and respect.

We Fix it. You Relax

Enjoy the comfort of knowing the job was done right—no stress, no surprises.

Testimonials

Real Customer Reviews

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Frequently Asked Questions

Answers to FAQs

Do you offer 24/7 emergency plumbing services?

Yes! We’re available around the clock to handle urgent plumbing, heating, or cooling issues—day or night.

Absolutely. Every technician is fully licensed, insured, and trained to meet all local and state codes in New Jersey.

We proudly serve homeowners and businesses across many parts of New Jersey. Contact us to confirm service in your area.

Yes, we provide comprehensive services for homes, offices, retail spaces, and new construction projects.

Have a question or need service?
Our team is ready to assist you.

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