General plumbing services on Cape Cod

Shower head installation in Harwich

Reliable plumbing for commercial and residencial needs, done right by a local expert.

From leaky faucets to full kitchen setups, we take care of everyday plumbing with attention, speed, and experience. We handle appliance hookups, fixture installs, and quick repairs so you don’t have to worry. Clean work, done right the first time.

Keeping things flowing since day one

We handle plumbing for restaurants, offices, retail spaces, and more. From new installs to ongoing maintenance, we deliver reliable, code-compliant work that keeps your business running without disruptions.

Commercial general plumbing

We can help you with

  • Leaky faucets and fixtures


  • Toilet repairs and installations

  • Garbage disposal fixes

  • Water line and drain repairs


  • Pipe replacements and upgrades


  • Dishwasher hookups

  • Plumbing inspections & tune-ups

    and more


Kitchen plumbing and appliance hookup

This video clip shows the completed installation of new plumbing lines with hookups for a dishwasher and gas stove. Clean, efficient work done for a Cape Cod homeowner.

Why people keep calling us back

  • ★★★★★

    I highly recommend Dunphy Plumbing. Bill (the owner) personally responded to me when I inquired about replacing a leaking faucet and adding a water line to my refrigerator. He showed up the very next day, perfectly on time! While in my home he was prepared when he came (even bringing a replacement faucet incase he couldn’t repair mine), efficient with his time and cleaned up after himself. Even with the next day appointment and the amount of work he had to do for me, his invoice was very reasonable…maybe a little surprising in a good way.

    – H. G. Newton

Local, reliable, and easy to work with

When something goes wrong with your plumbing, you want someone who shows up on time and fixes it properly.

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

Common questions about our general plumbing services

Basement plumbing rough-in for new construction on Cape Cod, MA

  • If it's leaking, gurgling, backing up, or just feels “off,” it’s worth a call. We’ll tell you honestly if it’s a quick fix or something more.

  • Yes! We’re happy to schedule service around your renovation plans, vacation time, or seasonal needs.

  • Yes, we offer routine maintenance services for commercial clients to help prevent plumbing emergencies and ensure systems stay up to code. From water heaters to gas lines, we’ll keep everything running smoothly.

  • Absolutely. We’re fully licensed in Massachusetts (#31699) and always work to code.

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

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Need a plumber on Cape Cod?

Have a plumbing or heating issue? Call us or fill out the form — we’ll get back to you quickly.

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