Recent Blog Posts

Reliable Plumber

Monroe, OH

Senior, Military & Veteran Discounts

Free Estimates

Honor Manufacturer Warranties

Professional Plumbing Solutions Since 1935

Duff Plumbing Company has provided dependable plumbing services to Middletown, OH and the surrounding areas for nearly nine decades. As a third-generation family-owned business, we uphold the same dedication to quality and customer satisfaction that our founders established in 1935.

Our team brings more than 100 years of combined experience to every project, supported by three certified master plumbers and an architectural engineering degree. We provide free estimates, respond to quote requests, and arrange on-site evaluations in a timely, efficient manner. Contact us today.

Why Choose Us

White checkmark in a black circle icon.

Founded in 1935

White check mark inside a black circle icon on a white background

Licensed and Insured Business

White checkmark inside a black circle icon on a white background

Stand Behind Our Work

Black checkmark icon inside a circle on a white background

Locally & Family Owned & Operated

White checkmark inside a black circle icon

Architectural Engineering Degree

White checkmark in a black circle icon

100+ Years of Combined Experience

Bright white bathroom with a walk-in shower, double vanity, and black towel hooks

Plumbing Fixture Services

Our trained and licensed technicians handle plumbing fixture installations, repairs, and replacements with precision and care.

Drains and Pipes

We address drain clogs, pipe repairs, and complete line replacements using current industry techniques and quality materials.

Gas Line Installation and Repair

Natural gas systems require specialized knowledge and precise execution to ensure safe, code-compliant operation in your home. Our licensed technicians handle complete installations for new construction and appliance conversions.

Residential Plumbing Services

From routine maintenance to complex installations, we deliver comprehensive residential plumbing solutions backed by our workmanship guarantee.

Water Heater Services

Our specialists install, repair, and maintain all water heater types while honoring manufacturer warranties for your protection.
Duff Plumbing Co
Senior Citizen Plumbing Discounts
Duff Plumbing Co is proud to offer special discounts for senior citizens throughout Middletown, OH and surrounding areas. Our experienced plumbers provide quality service at rates designed with seniors in mind.
Contact Duff Plumbing Co today to schedule your service and claim your senior discount.

Not valid with any other offers or promotions. Restrictions apply.

Must mention this coupon at the time of scheduling.

Duff Plumbing Co
Military and Veteran Savings
We honor those who serve and have served with exclusive discounts for active military members and veterans. Duff Plumbing Co delivers reliable plumbing solutions to our heroes in Middletown, OH and beyond.
Reach out to Duff Plumbing Co to take advantage of your military or veteran discount.

Not valid with any other offers or promotions. Restrictions apply.

Must mention this coupon at the time of scheduling.

Recent Projects

Turquoise ocean waves crashing with white foam and spray
A winding river cutting through dense green forest
Wind-sculpted sand dunes with soft pink and tan ripples in close-up view
Person icon with a speech bubble containing three stars, suggesting a review or rating.

Here's what our satisfied customers are saying...

At Duff Plumbing Co, we take pride in providing exceptional plumbing services to our customes. We would be grateful if you could share your thoughts about our business with others. Your feedback helps us improve and helps others make informed decisions. Please take a moment to leave a review of Duff Plumbing Co and let others know what you think.

Frequently Asked Questions

  • How long has your family business been serving local homeowners?

    Our company was established back in 1935, which means we have nearly nine decades of history behind our work. Over the generations, our family has focused on building long-lasting relationships with neighbors throughout the community. If you are searching for an experienced plumber in Monroe, OH, our team brings a deep history of hands-on expertise to every single appointment. Today, our technicians draw from more than 100 years of combined experience across all types of residential and commercial systems. Having three certified master plumbers on staff helps us complete every task with exceptional precision and care. We also hold an architectural engineering degree within our leadership, allowing us to evaluate complex structural layouts and pipe routing with a high level of technical knowledge. Above all, we take great pride in honoring the strong work ethic established by our founders so many years ago.

  • What specific types of plumbing services do you offer?

    We focus on three primary areas to keep your property running smoothly day after day:


    • Plumbing fixture services, including full installations, precision repairs, and replacements
    • Drain and pipe solutions, ranging from routine clog removal to complete line replacements
    • Water heater services, covering repairs, ongoing maintenance, and new unit setups

    When you schedule a plumber in Monroe, OH, you get a dedicated team that uses current industry techniques and high-quality materials on every job site. Whether you have a leaky kitchen faucet, a slow basement drain, or a warm water supply that keeps cutting out, our certified technicians can diagnose the issue and fix it cleanly. We make sure every repair or installation fits your specific layout so you can enjoy reliable performance for years to come.

  • How do you handle project quotes and initial evaluations?

    We believe getting answers about your home should always be straightforward and stress-free. When you reach out to book a plumber in Monroe, OH, we handle your quote requests, organize free estimates, and set up on-site evaluations in a timely, efficient manner. We know your calendar is busy, so we focus on prompt communication right from your first phone call or message.


    Here is what you can expect during our initial evaluation process:


    1. We listen closely to your specific concerns or plans for your home.
    2. Our team reviews the site to assess your current pipes, fixtures, or heating units.
    3. We provide a free estimate outlining the necessary work with clear, straightforward terms.

    This approach gives you complete clarity on the scope of the project before any hands-on work starts, allowing you to make comfortable decisions for your home.

  • Are your technicians licensed and insured for home projects?

    Yes, our business is fully licensed and insured, protecting your property throughout every phase of the project. When a plumber in Monroe, OH arrives at your door, you can rest easy knowing certified technicians are managing the job safely and correctly. Our team features three certified master plumbers who oversee complex installations and ensure every project meets local requirements. Combining that master-level certification with an architectural engineering degree allows us to address technical challenges that standard contractors might overlook. We also stand behind our work on every single assignment, giving you complete peace of mind from start to finish. We train continuously on modern industry standards and safety practices, ensuring that your property remains clean, secure, and fully operational while we perform repairs, drain clearings, or fixture replacements.

  • How do you handle water heater repairs and manufacturer warranties?

    Water heaters are essential for everyday comfort, from warm morning showers to running the dishwasher. When you hire a plumber in Monroe, OH to evaluate your hot water setup, we work on all system types, including traditional tanks and modern units. Our specialists handle complete installations, ongoing routine maintenance, and targeted component repairs.


    When servicing these systems, we follow these key guidelines:


    • We honor all manufacturer warranties to keep your protection fully intact.
    • We use high-grade parts during repairs to extend the life of your equipment.
    • We inspect all connected lines and valves to prevent sudden future leaks.

    By protecting your warranty coverage and adhering strictly to manufacturer guidelines, we ensure your hot water system operates safely and efficiently. We walk you through every step of the process so you know exactly how to maintain your unit.

  • What sets a third-generation family business apart from other contractors?

    As a third-generation family-owned and operated business, we treat every customer like a long-time neighbor. When you invite a plumber in Monroe, OH into your home, you deserve courteous service, clear answers, and technicians who treat your property with genuine respect. Having operated locally since 1935, our reputation means everything to us. We do not rely on high-pressure sales tactics or overly complicated jargon; instead, we offer honest advice and practical solutions tailored to your exact budget and structural layout. With over a century of combined experience, our licensed technicians bring time-tested problem-solving skills to every job site. We stand behind our work, deliver on our promises, and aim to be the local team you feel comfortable calling whenever a pipe, drain, or fixture needs professional attention.

  • What steps should I take if I suspect a pipe or drain issue in my home?

    If you notice signs like slow drainage, unusual sounds, or water pooling near your fixtures, taking quick action can help prevent further issues. When you reach out for a plumber in Monroe, OH, our team can help walk you through immediate troubleshooting steps over the phone before we arrive for an on-site evaluation.


    Here are a few quick actions to consider while waiting for our technician:


    • Shut off the main water valve if you notice active leaks or overflowing fixtures.
    • Avoid using chemical drain cleaners, as they can cause long-term wear on your piping.
    • Clear away personal items around the affected area so our team can begin work immediately.

    Once on site, our licensed technicians evaluate the entire line using current industry techniques to identify the source of the clog or leak. We give you a clear explanation of what is happening along with a free estimate, making it easy to decide on the right repair for your property.