★★★★★
They offered some good advice and we were very happy with the work.
Steve Klemp, Google review
5.0 on Google reviews
Plumbing service in Wilmington and New Castle County, DE.
We handle plumbing repairs, drain cleaning, water heaters, water treatment, pumps, kitchen plumbing, and whole-house repiping.
A.J. Dauphin & Son publishes a 1939 founding, Delaware plumbing license number 1, and service across New Castle County and parts of Kent and Sussex counties.
5.0
Google rating
12
Google reviews
Wilmington
Local service base
DIRECT
Phone contact
Wilmington plumbing since 1939
An established plumbing company should solve the actual problem, not inflate the scope.
The official company history states that A.J. Dauphin & Son was founded in 1939 and held Delaware's first registered plumbing license, license number 1.
Published services include plumbing repairs, water heaters, water treatment, drain cleaning, pumps, kitchen remodeling support, and repiping across New Castle County and parts of Kent and Sussex counties.
Customer reviews describe second opinions that avoided unnecessary wall cuts, calm explanations during major repiping, prompt appointments, careful cleanup, and correct solutions at fair prices.
Services
Plumbing for repairs, water, drains, equipment, and renovation work
Choose the service closest to the problem. Each page explains what details help the office and plumber understand the call.
Plumbing Repairs
We handle household plumbing problems involving fixtures, supply lines, connections, leaks, and equipment.
Learn moreDrain Cleaning
We clear blocked drains and diagnose recurring slow or stopped drainage before unnecessary demolition is considered.
Learn moreWater Heaters
We service and replace water heaters when hot water is unreliable, equipment leaks, or a new system is needed.
Learn moreWater Treatment
We help homeowners evaluate water-treatment and softening needs based on the home and water concerns.
Learn morePumps
We service plumbing pump equipment based on the system, operating problem, and access at the property.
Learn moreRepiping and Renovation
We coordinate repiping and kitchen plumbing around active renovation work, fixtures, cabinets, filtration, and final connections.
Learn moreWork photos
A familiar local name and hands-on plumbing service
A focused look at A.J. Dauphin's recognizable service van, company identity, and hands-on water-heater work.
A.J. Dauphin service van
Company identity
Water-heater service
Project photo
Established Wilmington business
Company identityReputation
What customers say about the work
★★★★★
They arrived on time, snaked the line, completed the task, cleaned up the area.
Christopher Osbourn, Google review★★★★★
Prompt, personable, patient and skilled: that's AJ Dauphin and Son.
Annamarie Medeiros, Google review★★★★★
Newt and John were fantastic - total professionals who clearly take pride in their work.
Lara Zeises Deloza, Google reviewService area
Wilmington, New Castle County, and published parts of Kent and Sussex counties
We serve Wilmington, New Castle County, and published parts of Kent and Sussex counties. Use the location pages below to see how the same services apply in nearby communities.
Tell us the property location, what needs attention, and the result you need.
FAQ
Questions about working with A.J. Dauphin & Son
How long has A.J. Dauphin & Son been in business?
The official company history states that the business was founded in 1939.
What is Delaware plumbing license number 1?
The official site states that A.J. Dauphin was Delaware's first registered plumber and held license number 1.
Do you handle drain cleaning and repiping?
Yes. Both are listed services and customers describe completed drain-cleaning and repiping work.
Start here
Tell us what the plumbing is doing now.
Share the fixture or system, symptoms, visible water, access, and any work already attempted. We will help determine the next step.