Pure Water. Straight From Your Tap.
Most water in southeastern Pennsylvania meets the legal safety standard. That standard is not the same as clean. Chlorine, PFAS (forever chemicals), lead, arsenic, and nitrates can all pass through a public treatment plant or a private well and land in your glass — within legal limits.
At Dierolf Plumbing and Water Treatment, we start with a water test, not a sales pitch. We find out what is actually in your water, then recommend the system that matches it.
Why Southeastern PA Homeowners Choose a Drinking Water System
We Test First. Then We Recommend.
Most water treatment companies walk in ready to sell you whatever system they carry. We’ve seen the results of that — homeowners who paid for reverse osmosis when ultrafiltration was a better fit, and homeowners who bought the wrong system entirely because no one tested their water first.
Our experienced service technicians test your water before making any recommendation. We look at what’s actually in it, size the system for your household, and explain the difference between options in plain language. If your water doesn’t need a system, we’ll tell you that too.
How We Help You Choose the Right System
Three Systems. One Right Answer for Your Water.
We offer three drinking water solutions for southeastern Pennsylvania homes. Your water test tells us which one makes sense for you — and we’ll explain the difference in plain language, not technical jargon.
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Not sure what’s in your water? Find out →
Our Drinking Water Systems Protect and Purify
We offer three distinct drinking water solutions for homes across Bucks, Montgomery, Chester, Delaware, Berks, and Lehigh counties. Your water test tells us which one fits your situation.
Reverse Osmosis
Removes up to 99% of contaminants — PFAS, lead, arsenic, nitrates, heavy metals, chlorine, bacteria, and viruses. The right choice when chemical contamination is present.
Ultrafiltration
Removes bacteria, viruses, cysts, and sediment while keeping beneficial minerals like calcium and magnesium. Best for microbial concerns, especially on private well water.
Ultrapure Alkaline
RO-level purification with a remineralization stage that restores calcium and magnesium and raises the pH. Deep purification without sacrificing minerals.
Our Drinking Water System Installation Process
We Make It Easy — From Water Test to Working System
1
Water Quality Assessment
We start with a real water test — not a guess based on your zip code. We identify exactly what contaminants are present and at what levels before recommending anything.
2
Customized System Recommendation
Based on your test results, we recommend the right system — reverse osmosis, ultrafiltration, or ultrapure alkaline — sized for your household. We explain the difference in plain language, not sales language.
3
Professional Installation
Our experienced service technicians install your system cleanly and correctly, integrating it with your existing plumbing. Most installations are completed in a single visit.
4
Testing and Walkthrough
After installation, we confirm the system is performing correctly and walk you through how to use it, what to watch for, and when to expect your first filter service. You leave knowing exactly how your system works.
The Dierolf Difference
Hundreds of 5-Star Reviews
Southeastern Pennsylvania homeowners trust us because we test first, recommend honestly, and stand behind every installation.
Frequently Asked Questions
How often do I need to maintain my drinking water system?
For reverse osmosis systems, pre-filters typically need replacement every 6 to 12 months and the membrane every 2 to 3 years depending on your water quality and usage. Ultrafiltration systems require less frequent service. We provide a maintenance schedule with every installation and can handle filter changes during an annual visit.
Does reverse osmosis remove PFAS from drinking water?
Yes. Reverse osmosis is one of the most effective methods for removing PFAS (forever chemicals) including PFOA and PFOS. This is particularly relevant for homeowners in Bucks, Montgomery, and Chester counties where PFAS contamination in public water has been documented.
How do I know which drinking water system is right for me?
A water test tells us. The right system depends on what’s actually in your water — not what you assume is in it. Schedule a free water test and we’ll give you a specific recommendation based on the results.
Do I need a drinking water system if I already have a water softener?
They serve different purposes. A water softener addresses hardness and protects your appliances and plumbing. A drinking water system addresses what’s in the water you consume — PFAS, lead, bacteria, nitrates. Many of our customers in Bucks, Montgomery, and Berks counties have both.
Schedule Your Free Water Test
Find out exactly what’s in your water — no obligation, no pressure. One of our experienced service technicians will test your water and give you a straight answer about what you’re dealing with and what, if anything, you need.
We do it ALL!
Dierolf Plumbing and Water Treatment is all about water. We specialize in wholesale water testing and water treatment systems for residential purposes. We also offer a full range of plumbing services. From the basic residential plumbing services such as fixing leaks to installing septic systems, we can take care of you every step of the way.
