Water heater services on Cape Cod

Repairs, replacements, and installations.

We install, repair, and replace water heaters for homes and small businesses across Cape Cod. Whether you’re dealing with cold showers, a leaking tank, or you’re ready to switch to a tankless system, we’ll help you find the right setup and get it working fast.

Hot water issues?

What we can help with

  • Water heater repairs

  • Replacements for old or failing units

  • New water heater installations

  • Tankless (on-demand) water heaters

  • Leak issues and valve problems

  • Hot water recovery problems

  • Safety checks and code compliance

    and more

A look inside a recent boiler and water heater install

This short video shows one of our recent boiler and water heater installs here on Cape Cod. We replaced an old system and set up a new, efficient system that’s ready to go. Every job is a little different, but we always aim for clean work, safe setup, and reliable heat and hot water.

Local knowledge you can count on

Whether you need a new water heater or a repair, we’ll recommend the right fit, install it safely, and make sure it lasts.

We have over 20 years of experience serving residential and commercial plumbing needs in Harwich, Dennis, Chatham, Brewster, Yarmouth, and nearby towns on Cape Cod.

Local Work, Real Results

  • ★★★★★

    These guys are awesome, super responsive, nice, knowledgeable, and did such a great job. I would highly recommend and honestly wouldn’t use anyone else. I’ll be using Dunphy for any future plumbing&heating needs.

    We are in Dennis, MA (South Dennis area), and he quickly fixed our instant hot water heater and outside hose spigot. Gave great recommendations for future hot water heater models and ours is nearing end of life. He did our annual hot water heater maintenance.

    Great customer service, so fast, and best plumber on Cape Cod in my opinion.

    – K. Fullerton

Common Questions about Water Heaters

  • Most traditional tank water heaters last 8–12 years, while tankless models can last up to 20 years with regular maintenance.

  • Tankless systems save space and can be more energy-efficient, but they’re not always the best fit for every home. We’ll help you weigh the pros and cons.

  • Yes — we work with both private homeowners and commercial property managers to make sure water heaters are reliable year-round or ready for the season.

We serve expert plumbing and heating services on Cape Cod, including:

Need water heater help on Cape Cod?

Call or send a message and we’ll get it sorted fast.

For urgent problems, we offer 24/7 emergency services.
Call (508) 243-1946