Anne Arundel County DPW‑Certified Backflow & Cross‑Connection Technicians

Licensed technicians providing accurate testing, inspections, and documentation that meet all Anne Arundel County Department of Public Works backflow prevention requirements.

Serving Anne Arundel County With Department of Public Works (DPW)‑Compliant Backflow Protection

Across Anne Arundel County, property owners depend on DPW‑certified technicians to keep their water systems safe, documented, and fully compliant with local backflow prevention standards. Commercial facilities, multi‑unit properties, and single‑family homes all face unique cross‑connection risks, and our licensed team is trained to identify issues quickly, perform accurate testing, and provide the proper DPW‑approved documentation. With a focus on reliability, clear communication, and fast turnaround times, we help you stay ahead of inspections, avoid compliance setbacks, and maintain a safe, protected water supply year‑round.

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Our Backflow Testing & Prevention Services

DPW‑certified technicians delivering reliable testing, inspections, and compliance support for homes and commercial properties across Anne Arundel County.

Backflow Testing

Protect your water supply with routine backflow inspections performed by certified professionals. We test and certify that your backflow prevention device is functioning properly and meets all regulatory requirements. Regular inspections help prevent contamination and ensure compliance with local plumbing codes.
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Backflow Repairs

If your backflow preventer is leaking, malfunctioning, or failing a test, prompt repairs are essential. Our technicians diagnose the issue and restore your system to safe working condition using high-quality parts and proven methods. We minimize downtime and ensure your water remains protected.
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Backflow Installations

Installing a backflow prevention device is a critical step in safeguarding your potable water. We handle everything from system design to final testing, ensuring your installation meets all code requirements and functions reliably. Ideal for new construction, irrigation systems, and commercial plumbing setups.
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Backflow Replacements

When your backflow preventer reaches the end of its service life or fails beyond repair, we provide expert replacement services. Our team removes the old unit, installs a new, compliant device, and performs full testing to confirm performance. Fast, efficient, and built to last.
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Backflow Prevention Certification Made Simple

Clear, compliant steps to get your backflow preventer tested, certified, and renewed every year

1. Schedule Certification Appointment

A quick call or form submission is all it takes to get your annual backflow test on the calendar at a time that works for you.

2. On‑Site Backflow Testing

Your certified technician arrives, performs the required pressure checks, and confirms whether your backflow preventer is working properly.

3. Repairs Completed if Needed

If anything fails during testing, the technician explains the issue and can complete most repairs immediately so you stay compliant without delays.

4. Official Certification & Paperwork Submission

Once your device passes, we file the official test report with the proper authority and provide you with a copy for your records.

5. Annual Renewal Required

Backflow preventers must be certified every year. Simply schedule your annual renewal to keep your property compliant and protected.

Understanding Backflow, Prevention, and Cross‑Connection Control

A simple breakdown of what backflow is, how it threatens water quality, and the certified systems used to stop it.

What is Backflow?

In plumbing, the term backflow defines wastewater that is flowing backward towards - and possibly into - clean water lines. A property must prevent backflow to avoid its clean water supply from being contaminated by wastewater. 

Backflow Prevention

Backflow prevention refers to an engineered system’s preventative measures to stop water from flowing the wrong way. In most scenarios, backflow prevention is intended to keep wastewater from returning and entering into clean water lines and the fresh water supply.
Backflow Systems

Cross-Connection

Any connection between clean (potable) water and non-potable water where contamination could occur. This differs from backflow in that it is the physical connection that allows contamination, whereas backflow is the event where contaminated water actually flows backward. Cross-connection is prevented by installing backflow prevention devices, such as air gaps, vacuum breakers, RPZs, etc. 

Common Types of Backflow Prevention

At Nationwide, we routinely service each of the following backflow systems:

Double Check Valve Assembly (DCVA)

Used in low contamination risk situations, this system uses two check valves in a series to prevent backflow.

Reduced Pressure Zone Device (RPZ / RPBA)

Used in high risk contamination scenarios such as facilities that produce chemical, medical, and industrial waste. The RPZ protects against both back-pressure and back siphonage.

Air Gap

Physical space between the water outlet and the highest possible water level.

Atmospheric Vacuum Breaker (AVB)

Commonly used in irrigation systems. A simple system that uses air to stop back-siphonage

Pressure Vacuum Breaker (PVB)

Commonly used outdoors in commercial sprinkler setups. It’s like AVB but works under constant pressure.

Backflow Prevention for Commercial and Residential Properties

Commercial

Commercial properties in Anne Arundel County must meet strict DPW backflow prevention standards. Our certified technicians provide accurate testing, clear documentation, and dependable service for offices, retail spaces, restaurants, industrial facilities, and multi‑unit buildings.

Residential

Homes across Anne Arundel County rely on proper backflow prevention to keep drinking water safe from everyday cross‑connection risks. Our DPW‑certified technicians deliver quick testing, simple documentation, and reliable protection for your home’s plumbing system.

Reach Out! We’re Ready to Help

Have a question or need service? Reach out today to speak with our team. We’re here to provide fast, professional plumbing support and help you get your system back on track—no matter the size of the job.
**$99 Backflow inspection up to 8" devices!**
**$99 special on any 2nd floor small indoor drain!**
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