The First Registered Plumber in the First State

Founded all the way back in 1939, A.J. Dauphin & Son was the very first registered plumber in the First State. That’s right - we’re proud to hold License #1. Based in Wilmington, we’ve been serving Newcastle County, parts of Kent County, and parts of Sussex County for over 80 years. In that time, we’ve gained valuable knowledge and experience, making us industry experts. Get in touch with us today for residential plumbing services!

Company Van — Wilmington, DE — A.J. Dauphin & Son

Black and White Truck — Wilmington, DE — A.J. Dauphin & Son

Why Choose Us?

For decades, A.J. Dauphin & Son has been the go-to plumber in Wilmington, DE. We offer high-quality service for a reasonable rate, and we never skimp on honest and friendly service. We provide fast turnaround times and will come to you when you need us most. With a range of expertise from water treatment systems to drain cleaning, we’re you’re the one-stop shop for all plumbing services.

Our Plumbing Services

We provide a variety of residential plumbing services. We work on those annoying nuisances like leaky faucets and slow-draining sinks, all the way up to bigger projects like kitchen remodels and plumbing re-piping. Click on the links below to find out more!

What Our Clients are Saying

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1st Class Service! Timely, Appropriate, Reasonable Price. I have had my many things done by Dauphin's (Furnace replaced, water heater replaced, and various other plumbing repair). I would recommend A.J. Dauphin & Son to anyone that might need a plumber.

Dr. Ben C.

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A.J. Dauphin had been recommended to us when we needed plumbing services. That was nine years ago. We were delighted with the quality of work performed and we have continued to rely on them ever since. Customer service, particularly responsiveness, is critical to us. Whenever we have a problem, we know we will have it dealt with promptly and effectively. They are respectful of the fact that modern life is busy and they work hard to accommodate us.

Laurie N.

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I couldn't have asked for a better team! The work they did was impeccable and they left the work area spotless. Newt and John were timely, professional, and clearly take pride in their work. Dan, the owner, was so incredibly nice and talked through things with me every step of the way. He was so flexible about me needing to reschedule follow ups due to other factors with the reno, and even though the guys had to come back twice (once to extend water lines through the new base cabinets and a final time to hook up the dishwasher, sink, etc.), he only charged me an additional $60 for parts needed. Not even labor. Who does that? I will never use another plumber. Never.

Lara Z.

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I was very impressed with their service. The work was done to my satisfaction. They came out right away and didn't overcharge.

Maude P.

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They coordinated with the city and everything was on schedule.

Dana R.

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They were punctual, professional, and provided quality service. First plumber that we've interacted with that was actually on time! They were able to determine that we had a bad hose on our new washing machine which tripped the auto shut off valve (learned to always put a new hose on when upgrading appliances despite what the installer may say). Only 'complaint' was their $165/hr rate. However, we did get our moneys worth in terms of professionalism and knowledge. If we needed a 'big' job done, I would be hesitant to spend that kind of money. However, if you demand high quality work and above and beyond professionalism, they are certainly worth the price!

Kendall K.

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Another job well done by A. J. Dauphin and son!
They are fast, reliable, clean and very reasonable with their pricing. Customer service is outstanding, I won't go anywhere else. You can trust these guys. You have my word.
Even during this pandemic, and being short staffed, I was called first thing in the morning, and they were here within the hour. NONEMERGENCY..here within the hour. Done within an hour. Kudos, guys! Stay safe!

Maxx R.

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1st Class Service! Timely, Appropriate, Reasonable Price. I have had my many things done by Dauphin's (Furnace replaced, water heater replaced, and various other plumbing repair). I would recommend A.J. Dauphin & Son to anyone that might need a plumber.

Dr. Ben C.

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A.J. Dauphin had been recommended to us when we needed plumbing services. That was nine years ago. We were delighted with the quality of work performed and we have continued to rely on them ever since. Customer service, particularly responsiveness, is critical to us. Whenever we have a problem, we know we will have it dealt with promptly and effectively. They are respectful of the fact that modern life is busy and they work hard to accommodate us.

Laurie N.

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I couldn't have asked for a better team! The work they did was impeccable and they left the work area spotless. Newt and John were timely, professional, and clearly take pride in their work. Dan, the owner, was so incredibly nice and talked through things with me every step of the way. He was so flexible about me needing to reschedule follow ups due to other factors with the reno, and even though the guys had to come back twice (once to extend water lines through the new base cabinets and a final time to hook up the dishwasher, sink, etc.), he only charged me an additional $60 for parts needed. Not even labor. Who does that? I will never use another plumber. Never.

Lara Z.

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I was very impressed with their service. The work was done to my satisfaction. They came out right away and didn't overcharge.

Maude P.

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They coordinated with the city and everything was on schedule.

Dana R.

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They were punctual, professional, and provided quality service. First plumber that we've interacted with that was actually on time! They were able to determine that we had a bad hose on our new washing machine which tripped the auto shut off valve (learned to always put a new hose on when upgrading appliances despite what the installer may say). Only 'complaint' was their $165/hr rate. However, we did get our moneys worth in terms of professionalism and knowledge. If we needed a 'big' job done, I would be hesitant to spend that kind of money. However, if you demand high quality work and above and beyond professionalism, they are certainly worth the price!

Kendall K.

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Another job well done by A. J. Dauphin and son!
They are fast, reliable, clean and very reasonable with their pricing. Customer service is outstanding, I won't go anywhere else. You can trust these guys. You have my word.
Even during this pandemic, and being short staffed, I was called first thing in the morning, and they were here within the hour. NONEMERGENCY..here within the hour. Done within an hour. Kudos, guys! Stay safe!

Maxx R.

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