34 Deforest Ave, #9

East Hanover, NJ 07936

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(973) 577-5123

Tankless Water Heaters

Endless Hot Water, Lower Energy Bills & Reliable Performance

Tankless Water Heater Installation & Repair

Tankless water heaters deliver on-demand hot water, improved efficiency, and longer system lifespan compared to traditional tanks. At William C. Diamond Plumbing & Heating, we specialize in installing, repairing, and maintaining tankless water heaters for New Jersey homeowners. Whether you’re upgrading for better performance or need expert troubleshooting, our licensed technicians provide clean, efficient service and honest guidance.

A properly installed tankless unit ensures consistent hot water, reduced utility costs, and a more compact, modern system that frees up valuable space.

Our Tankless Water Heater Services Include:

Why Choose a Tankless Water Heater?

Modern, Energy-Efficient Technology Designed for Your Home

Tankless water heaters offer multiple benefits that make them an excellent long-term investment. We help you choose the right system for your home based on household size, hot water usage, and fuel type. Benefits of Tankless Systems:

  • Endless hot water when you need it
  • Up to 30–40% more energy efficient than tank heaters
  • Longer lifespan—up to 20 years or more
  • Compact wall-mounted design
  • Reduced risk of water damage from tank leaks
  • Ideal for bathrooms, kitchens, laundry rooms & multi-fixture homes

Our technicians ensure every installation meets manufacturer guidelines and local code requirements for safe, reliable operation.

Our Commitment to Your Comfort & Satisfaction

At William C. Diamond Plumbing & Heating, we install and service tankless systems designed for long-term performance, following best practices for tankless water heater energy efficiency to help New Jersey homeowners and businesses reduce energy waste while enjoying reliable hot water when they need it.

“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

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.

What Homeowners Want to Know

Tankless Water Heater FAQs

1. How long do tankless water heaters last?

Tankless units typically last 20 years or more with proper maintenance—nearly double the lifespan of traditional tank heaters.

Yes—as long as the unit is correctly sized for your home. We ensure your system matches your household’s hot water demands.

Most units require annual descaling and flushing to remove mineral buildup and maintain efficiency.

Yes. Many homeowners upgrade to tankless for better efficiency and performance. Some homes may need gas lines or electrical upgrades.

Initial installation costs are higher, but long-term savings on energy and reduced maintenance often make them more cost-effective over time.

Thinking About a Tankless Water Heater?

Contact William C. Diamond Plumbing & Heating today to schedule installation or service and experience the comfort of endless hot water.