RPZ Plumbing Valve Testing
Our certified plumbing experts provide comprehensive RPZ valve testing to ensure your backflow prevention systems function flawlessly and protect your water supply. Regular testing is essential not only for regulatory compliance but also for preventing contaminants from entering your clean water. Using advanced diagnostic tools, we thoroughly inspect your RPZ valves, quickly identify any issues, and offer prompt repair or replacement solutions as needed.
- Certified testing by licensed professionals
- Advanced diagnostics for thorough inspections
- Proactive maintenance to prevent contamination
Installation Solutions
A.J. Alberts' provides professional installation of RPZ solutions fit for your family.
Inspection Services
We can inspect your current RPZ system to ensure your family isn't in need of any critical solutions.
Expert Maintenance
Replacing your system isn't always an option. That's why we provide expert maintenance on existing RPZ systems.
RPZ and Backflow Services
RPZ devices are designed to prevent water from backing up into the supply of drinking water. The RPZ valve opens up when the water pressure drops and then dumps the water out. This happens to prevent backflow and contaminates from entering the municipal drinking water. A backflow preventer device is required for many of our residential and commercial customers. If you find yourself with a broken backflow device, our fully trained and licensed team can guide you through the process to repair or replace it and resolve your issues. You can rest easy knowing that our testing and installs are done in an efficient and timely manner.
Backflow Testing
If you have a backflow preventer or RPZ valve, many municipalities require that your device be tested annually to ensure it’s functioning correctly and protecting your water supply from contamination. At AJ Alberts Plumbing, our backflow testing service is designed to make this process as seamless as possible. Our certified technicians perform thorough testing using state-of-the-art diagnostic equipment, and we handle all the necessary paperwork and compliance documentation for you. This way, you can rest assured that your system meets local safety standards and that your water remains safe and clean.
Trustworthy Repair and Testing
Our Team Maintains Your Backflow Devices
Our team has years of experience installing and servicing backflow preventers and RPZ valves. You can rest easy knowing that our highly experienced and professional technicians are working to protect your water supply Our team has been in the St. Paul and Woodbury area since 1989, so we know the requirements for backflow preventer testing in your area. You can have peace of mind when you call us, and trust we will get the work done right the first time.
Serving the Local Community Since 1989
Dedicated to providing expert plumbing services to the Twin Cities area.
Hi, I’m Steve Grohn, owner of A.J. Alberts Plumbing in Woodbury! For over 35 years, we’ve proudly served the Twin Cities Metro and Western Wisconsin with top-notch plumbing services, earning a 4.9-star Google rating. Our team of 10 skilled plumbers is always nearby, ready to handle everything from leaks and drain cleaning to boilers and water heaters. Contact us today—we make it easy!

Steve Grohn
Owner of A.J. Alberts
Years of Experience


What to Expect From Us
At A.J. Alberts, we believe in delivering prompt, honest, and high-quality service that respects your time and your home. From the moment you call us to the final cleanup, our team goes above and beyond to ensure a stress-free experience every step of the way.
- Friendly, responsive support
- Skilled, licensed, and respectful technicians
- Transparent pricing with no hidden fees
- Quality parts and guaranteed workmanship
- Local, family-owned expertise
- Quick support when you need us
- Serving both residential and commercial
- Efficient and Reliable
What Our Clients Say About Us
See how our friendly, reliable approach to plumbing has earned the trust of homeowners and businesses across the Twin Cities.
- Facebook Review | ⭐️⭐️⭐️⭐️⭐️
Facebook Review | ⭐️⭐️⭐️⭐️⭐️
- Facebook Review | ⭐️⭐️⭐️⭐️⭐️
Facebook Review | ⭐️⭐️⭐️⭐️⭐️
- Facebook Review | ⭐️⭐️⭐️⭐️⭐️
Facebook Review | ⭐️⭐️⭐️⭐️⭐️
news & articles
The Latest News
Stay informed with our expert tips, industry insights, and helpful updates designed to keep your home or business running smoothly.
If you’ve noticed leaking water when you flush the toilet, the culprit may be the…
Imagine a relaxing evening at home when suddenly, a clogged drain disrupts your peace. We’ve…
Clogged drains are a common household nuisance, but what do you do when the blockage…