Dierolf Plumbing and Water Treatment, LLC is a plumbing and water treatment business serving Southeastern Pennsylvania. Dierolf Plumbing and Water Treatment, LLC provides a range of core services including water treatment systems, water testing and analysis, drinking water systems, well systems, residential plumbing, and water heater installation and replacement. Dierolf Plumbing and Water Treatment also offers DEP compliance services and supports real estate water-related needs. The business serves multiple counties in Southeastern PA including Berks, Bucks, Chester, Delaware, Lehigh Valley, and Montgomery. Financing options are available for customers. Dierolf Plumbing and Water Treatment, LLC emphasizes service service and local water expertise.
Water Testing Service
Services
Services and categories listed for this business.
Water Treatment SystemsWater Testing & AnalysisDrinking Water SystemsWell SystemsResidential PlumbingWater Heater Installation and ReplacementDEP Compliance ServicesReal Estate Water Services
What areas does Dierolf Plumbing and Water Treatment serve?+
Dierolf Plumbing and Water Treatment, LLC serves Southeastern Pennsylvania, including Berks, Bucks, Chester, Delaware, Lehigh Valley, and Montgomery counties.
Does Dierolf Plumbing and Water Treatment, LLC offer water testing services?+
Dierolf Plumbing and Water Treatment, LLC offers water testing and analysis services to assess water quality.
Are financing options available for services?+
Dierolf Plumbing and Water Treatment, LLC Yes, financing options are available for customers seeking water and plumbing services.
Does Dierolf Plumbing and Water Treatment, LLC provide water heater services?+
Dierolf Plumbing and Water Treatment, LLC provides water heater installation and replacement services, including tank and tankless options.
What specialized compliance services does the company offer?+
Dierolf Plumbing and Water Treatment, LLC offers DEP compliance services related to water systems.
Dierolf did a wonderful job installing our new softener & UV system. They showed up on time, both for the initial visit & for the installation. David & his partner explained everything well when he came to see about our water softener problems. He & Sam installed the system & Sam gave me a very detailed explanation about how it all worked, troubleshooting, & answered all my questions while I recorded it for future reference. I highly recommend Dierolf & they will be my first call for any future plumbing issues. They are knowledgeable & professional.Thank you for outstanding service
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Dino DeBiasio
Dec 2, 2025
★★★★★5.0
We just purchased our home in June of this year with an existing water treatment system. We had no clue what we had or if it was working correctly. I called the number on the system and they wanted to sell me a new UV light and other stuff w/o even seeing the unit. I made the appointment but they never showed… thankfully!
I called Dierolf P&W right after and they put me on the schedule.
Ethan came out and showed me everything and how it works. He didn’t try to sell me anything extra that I didn’t need. He explained the UV light was still good for another 5 months. He changed the filter, ran water tests and adjusted some settings. We chatted a...We just purchased our home in June of this year with an existing water treatment system. We had no clue what we had or if it was working correctly. I called the number on the system and they wanted to sell me a new UV light and other stuff w/o even seeing the unit. I made the appointment but they never showed… thankfully!
I called Dierolf P&W right after and they put me on the schedule.
Ethan came out and showed me everything and how it works. He didn’t try to sell me anything extra that I didn’t need. He explained the UV light was still good for another 5 months. He changed the filter, ran water tests and adjusted some settings. We chatted a bit and he was a great young man, Very respectful and honest! He even explained a little bit of background about the company.
They have my business hands down from here on out. This is the way you run a business to get more business. I’d give 10 stars if possible.
A
Anne Gibson
Jan 27, 2026
★★★★★5.0
Brand new sump pump, brand new sump pump battery backup, everything is running smoothly. David ensured I understood pricing, timing, and kept me updated on progress. He made me comfortable in the choices I was making. I look forward to working with Dierolf for all my well and sump pump needs.
T
Tom Hosgood
Dec 9, 2025
★★★★★5.0
We had a system installed 9 years ago to take care of the multiple problems with our water. I was happy with the install then, and recently called for some service/maintenance. They sent out a tech named Sam, who did an excellent job at doing all the required maintenance to both the iron breaker and water softener. He was very thorough in checking and cleaning all the moving parts, nozzles, screens, etc., checked for proper operation of the units, and did a test on the raw water before treatment, and another on treated water to prove that everything was operating as it should. He was very knowledgeable on the equipment, explained everything w...We had a system installed 9 years ago to take care of the multiple problems with our water. I was happy with the install then, and recently called for some service/maintenance. They sent out a tech named Sam, who did an excellent job at doing all the required maintenance to both the iron breaker and water softener. He was very thorough in checking and cleaning all the moving parts, nozzles, screens, etc., checked for proper operation of the units, and did a test on the raw water before treatment, and another on treated water to prove that everything was operating as it should. He was very knowledgeable on the equipment, explained everything well, and answered all my questions. Since I first met Mark years ago when he designed our system, I've always thought Dierolf was a good company to do business with, and if they have good employees like Sam, they'll obviously continue to be the best choice around for water treatment.
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Patti Meyers
Feb 19, 2026
★★★★★5.0
John and Alec did a great job installing our new water softener system. They came prepared to make a repair or replacement ( as I requested)! No mess and quick service! I highly recommend Dierolf’s!!
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