Garnet Valley has quietly become one of the most sought-after zip codes (19060) in Delaware County. It is an area defined by growth and contrast. You have the historic charm of Bethel and Concord Townships sitting right next to massive new luxury developments like the ones from Toll Brothers. Whether you are moving into a sprawling new construction home near the Garnet Valley School District campus or renovating a classic farmhouse off Smithbridge Road, you are investing in a community that values quality. Since 2009, Dierolf Plumbing & Water Treatment has been the local partner ensuring that the water in these homes matches the high standards of the people living in them.
We are not a franchise. We are a locally owned business with over 25 years of field experience in our leadership. We understand the specific infrastructure challenges here. In the newer developments, we see modern homes with high-end plumbing systems that are being slowly destroyed by hard municipal water. In the more established or rural pockets of Garnet Valley, we manage private wells that face entirely different battles with iron and agricultural runoff. We believe in radical honesty. We don’t guess what’s in your water; we test it, explain the science, and let you decide how to handle it.
Protecting Your Investment from Hard Water
The majority of the new growth in Garnet Valley is served by public water (often Chester Water Authority or Aqua). While this water is safe to drink, it is typically “hard,” meaning it carries high levels of dissolved calcium and magnesium. In a standard home, this is an annoyance. In a luxury home with tankless water heaters, rainfall showerheads, and high-efficiency dishwashers, it is a disaster waiting to happen. Hard water scale coats the heating elements of tankless units, causing them to fail years before their warranty expires. We install data-backed water softening solutions that protect your plumbing investment and keep your fixtures looking brand new.
Chlorine and Well Water Concerns
If you are on public water, you are likely dealing with the “swimming pool” smell of chlorine or chloramines used for municipal sanitation. It dries out skin and affects the taste of your cooking. We specialize in whole-home carbon filtration that removes these chemicals at the source. For our neighbors on private wells, we look for different issues. The geology in this part of Delaware County can lead to low pH (acidic water) that eats copper pipes, as well as potential bacteria issues from surface runoff. We offer UV disinfection and neutralizers to ensure your well water is better than anything you can buy in a bottle.
We love working in Garnet Valley because it feels like a true community. After a job, you might find us grabbing lunch at Pagano’s Italian Specialties or seeing our trucks drive past Clayton Park. We know you work hard to live here—whether you are hitting a session at Main Line Health Fitness & Wellness or just commuting home. You shouldn’t have to work hard to get clean water from your tap.
For more details on local water quality, you can review the Chester Water Authority Reports or check the Concord Township website for community updates.
Comprehensive Water Solutions for Garnet Valley Residents
Our approach is built on “Test, Don’t Guess.” We do not walk into your home with a sales script. We walk in with a testing kit. We analyze your water quality right at your kitchen sink and explain the results in plain English. If your water is fine, we will tell you. If it needs treatment, we will design a solution that fits your specific plumbing architecture and budget.
Common Questions from Garnet Valley Homeowners
I have a new home. Do I really need a water softener?
If you have a tankless water heater, the answer is almost certainly yes. Manufacturers of tankless units often void warranties if the water hardness exceeds a certain grain count (usually 7-9 grains). Garnet Valley water frequently exceeds this, meaning a softener is an insurance policy for your expensive appliances. See our article “How to Know If Your Water Is Making You Sick” for more on how water quality affects your home.
Can you fix my low well pressure?
Yes. Low pressure on a well system is often a failing pump or a waterlogged pressure tank. We can diagnose well pump issues quickly and replace components to restore strong, consistent pressure to your second-floor showers.
What about PFAS or “Forever Chemicals”?
This is a growing concern in Delaware County. While municipal authorities are working on large-scale filtration, the only way to be 100% sure your drinking water is free of these contaminants is with a Point-of-Use Reverse Osmosis system. We install these under your kitchen sink for bottled-quality water on demand.
What Your Neighbors Are Saying
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“Awesome service by Mark and his team to help resolve a ruptured softener and installation of a new unit! Mark took a call off hours and was able to dispatch someone immediately. When it came to the new unit, Mark knows his stuff. As a chemical engineer, I was able to talk through the details of the resin bed design with Mark and the pros/cons of his. He is very knowledgeable of the systems and the chemistry.”
— Dan (Verified Review)
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“Highly responsive. Excellent service. Competitive pricing. My well tank was on its last leg. Bryan showed up on time, had the parts in his truck, and knocked the job out in a couple hours. I highly recommend Dierolf for all your plumbing and water treatment needs.”
— Matt W. (Verified Review)
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“Staff was very forthcoming with information, options, costs, and answered any question we had. They were polite, professional, courteous. Work was done to expectation, exceeded expectation, and continue to work with additional service as required beyond that of the original call.”
— Brian (Verified Review)
If you are tired of wondering what is in your water, let’s find out together. Contact us today for a transparent consultation and free water test.
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New customers get a FREE water test, including our In-House TC test for homes on wells, PLUS get $100 off the installation of a Water Treatment System!
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Bryan was very professional, courteous, and efficient. Great service, thank you!
Great job installing our new water filtration system! Installers were very communicative and efficient. Well done.
Very very helpful and nice people! Wow i thought companies that care were gone not so!!! Dierolf’s people care and i think it’s a real reflection of the owner and how he runs his company and actually cares!! Thank you for a super great job and for caring!!
Service was great and very efficient. The guys were very friendly and quickly replaced the pump without any issues. Thank you.
They did a great job installing a new toilet in my bathroom. They were neat, clean, and paid attention to detail. Chris answered all of my plumbing questions without hesitation. Very satisfied... Highly recommend
