Our Services


Our services include installing, replacing or repairing water heaters, kitchen sinks, toilets, gas water heaters, tubs & showers, and more.


We offer heating services for boilers, furnaces, pumps, as well as oil tank and radiant heat systems installations.

Drain Cleaning

Coming soon.

Areas we serve

Click on the links to learn more about our services in that area

Working For Northern New Jersey

When you need service for your plumbing or heating system, you want only the best plumber coming into your home or office. Thessen Services is your go-to Master Plumber for comprehensive plumbing, sewer, sump pump, and heating work. We guarantee all our work and make sure the job is done right the first time.

Whenever Thessen Services employees come to your home, they treat you and your property with respect. Thessen technicians let you know what the problem is and what it will take to fix it, before they do the work. You’ll have an estimate of costs before work begins. They pride themselves in doing the work correctly first time around.

The company’s many years of expertise assures you this is a plumbing company that is not going to fold up shop any time soon. Customers in the Northern New Jersey area can be assured of friendly, professional, environmentally-sound service with a long-held record of reliability.

Why Choose us

There’s a lot of Plumbing and Heating companies to choose from out there. But trust us, we’re not all the same. Here’s what makes us different:

Up Front Pricing

Years of Industry Experience

Fast & Reliable Service

Clean & Friendly Service Professionals

Fully Licensed and Insured

We Are Reputable, Liked and Trusted

We Own All of Our Equipment

We Do Specialty Jobs Most Others Wont

Fred Thessen & Bob Brannan


Thessen Services is trusted by businesses and individuals across Northern New Jersey. Here’s what some of them have to say about us:

"They were outstanding in every way from start to finish. Advice, performance, clean up, no end of courtesy just unbelievable fantastic people to do business with."

− Dieter W. in Westtown, NY - Project: Install or Replace a Shower

"The plumber was very professional and diligent. He even asked me for extra pieces of tiles to fill up some gaps on the floor that were open due to the different base of the old vs. the new toilet. He cut them and installed them as well. Good job!"

− Jose R. in Wanaque, NJ - Project: Install, Repair or Replace Plumbing or Fixtures

"Prompt, reliable and polite. Fixed an issue two other plumbers had failed to even identify. Already planning to have him back for some preventive maintenance."

− A Homeowner in Ringwood, NJ - Project: Clear a Clogged or Slow Drain

"Thessen Services was on time, neat work and was well within the ball park as far as cost."

− A Homeowner in West Milford, NJ - Project: Install or Replace a Water Heater

"Very quick to respond, friendly & helpful. I would recommend to others."

− Linda Y. in West Milford, NJ - Project: Install, Repair or Replace Plumbing or Fixtures