Backflow Prevention & Water Contamination
Protect your family and stay compliant with certified backflow testing, repair, and installation. We handle all paperwork and annual certifications for RPZ, DCV, and vacuum breaker devices.
Signs Your Drinking Water
May Be at Risk
Strange Taste or Odor
Water tastes funny, smells like chlorine, or has a metallic taste after sprinkler use.
Testing Notice Received
You received a letter from your water authority requiring annual backflow device testing.
Buying or Selling Home
Real estate transactions often require current backflow certification before closing.
Failed Inspection
Your device failed testing and needs immediate repair or replacement to restore compliance.
Why the County Requires
Annual Testing
Backflow prevention devices are critical safety equipment that protect the public water supply from contamination. Over time, seals wear, springs weaken, and debris can affect performance. Annual testing ensures these devices function properly when needed.
In Maryland, DC, and Virginia, water authorities require certified testers to inspect these devices yearly. Failure to comply can result in fines, water service interruption, or liability if contamination occurs.
Applications That Require Backflow Prevention
Three Types of
Backflow Preventers
Different applications require different levels of protection. We service all three types.
Reduced Pressure Zone (RPZ)
Provides the highest level of protection. Used where contamination could be toxic or hazardous to health.
- Chemical injection systems
- Medical/dental equipment
- Commercial kitchens
- Boiler systems
Double Check Valve (DCV)
Two independently acting check valves in series. Suitable for non-toxic, low-hazard applications.
- Fire sprinkler systems
- Residential irrigation
- Non-toxic process water
- Commercial HVAC
Vacuum Breakers (PVB/AVB)
Prevents back-siphonage only. Not suitable for back-pressure situations. Must be installed at least 12 inches above highest outlet.
- Irrigation systems
- Residential sprinklers
- Laboratory equipment
- Soap dispensers
Schedule Testing
Inspection & Testing
Repairs if Needed
Certification Filed
Local Code Requirements
Chesapeake Beach & Surrounding Areas
Maryland
- • Annual testing required
- • Certified tester must submit results
- • 10-30 days to repair failed devices
- • Compliance required for water service
Washington DC
- • Annual testing mandatory
- • DC Water manages compliance
- • Device must be approved assembly
- • Fines for non-compliance
Virginia
- • Annual certification required
- • Varies by municipality
- • Certified backflow tester required
- • Real estate transfers need compliance