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Dierolf Plumbing and Water Treatment, LLC

5.0 ★★★★★ · 193 Google reviews · 8 photos
Water testing service · Philadelphia, PA

Dierolf Plumbing and Water Treatment, LLC at a glance

Customers describe Dierolf Plumbing and Water Treatment as punctual, professional, and thorough in services ranging from water testing to softener installation. Technicians frequently receive praise for explaining systems in detail, maintaining clean work areas, and providing helpful advice on water quality. One reviewer noted a discrepancy between the promised pre-work estimate and the final hourly rate, which caused unexpected costs despite the quick completion of the task.

  • Google rating: 5.0 out of 5 from 193 reviews (98% five-star).
  • Reviews on this page: 193 Google reviews (156 with written comments, 1 with photos).
  • Owner responses: the business replied to 90% of reviews.
  • Most recent review: October 16, 2026.
  • Service: Well Inspector serving Philadelphia, Pennsylvania.

Data from Google, last updated October 25, 2026.

Photos

Customer reviews

5.0
★★★★★
193 reviews on Google
5★190
4★2
3★1
2★0
1★0

Reviews from Google, shown as published (original wording, unedited).

Rajiv Yajnik5 reviews
★★★★★

Excellent sales and service

Review from Google · view on Google
Sima ZlockLocal Guide · 43 reviews
★★★★★

I commend the company for providing exceptional service and remaining involved even after the system installation. I am particularly impressed with the way Steve Feigan works. He is very knowledgeable and professional.

Review from Google · view on Google
Robert Jacob11 reviews
★★★★★

Jeff Linden was great... he went above and beyond to determine why a toilet was leaking below the floor, corrected the issue, and then properly reinstalled the toilet, which was done incorrectly.

Review from Google · view on Google
Richard Rose10 reviews
★★★★★

David our tech was great. We will be using them for additional work.

Review from Google · view on Google
Jennifer S7 reviews
★★★★★

Colin did a fantastic job changing out out disposal!

Review from Google · view on Google
Patrick Murphy3 reviews
★★★★★

Dierolf Plumbing and Water Treatment did an excellent job troubleshooting pointing out defective components. Your Technican David Gomolka explained everything in great detail, and made it easy to understand what was going on. We had two companies in the past here and nobody's done as good a job as David did! Appreciate it, and would suggest your company to others...

Review from Google · view on Google
Dr CarchediLocal Guide · 101 reviews
★★★★★

Excellent and timely service and extremely knowledgeable. Top notch. Highly recommended

Review from Google · view on Google
Joseph Francht11 reviews
★★★★★

On time. Great guys. A pleasure!

Review from Google · view on Google
Linda Danese5 reviews
★★★★★

On time, very respectful, and informational. I have used Dierolf many times for water and well inspections, water analysis, and flow tests. I highly recommend Dierolf!

Review from Google · view on Google
Tim BeckLocal Guide · 21 reviews
★★★★★

Colin explained everything perfectly and made suggestions for my water treatment system. I would definitely use them for additional work in the future.

Review from Google · view on Google

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Business details