Backflow Services

Backflow Services 

in Alameda, Contra Costa and San Mateo Counties

At Monarch Plumbing and Rooter Inc., we provide expert backflow prevention and testing services to protect your property’s water supply. Backflow occurs when contaminated water flows backward into your clean water system, posing serious health risks. Our licensed technicians ensure your plumbing system is safe, compliant, and functioning properly.

Our services

  • Backflow Testing: Regular inspections to ensure your devices are working correctly and meet local regulations.


  • Backflow Installation: Professional installation of backflow prevention devices for new or upgraded plumbing systems.


  • Repairs and Maintenance: Quick repairs or replacements to fix faulty backflow devices and prevent contamination.


  • Compliance Certification: Documentation to satisfy local code requirements and protect your property.

Signs you may need backflow services

  • Unusual changes in water pressure


  • Contaminated or discolored water


  • Local code requiring annual backflow testing


  • Recent plumbing work that may affect your system


Protect your water and your health—schedule professional backflow services today with Monarch Plumbing and Rooter Inc.

Service Areas

Alameda County

  • Alameda
  • Albany
  • Berkeley
  • Dublin
  • Emeryville
  • Fremont
  • Hayward
  • Livermore
  • Newark
  • Oakland
  • Piedmont
  • Pleasanton
  • San Leandro
  • Union City
  • Ashland
  • Castlewood
  • Castro Valley
  • Cherryland
  • Fairview
  • Happy Valley
  • Hillcrest Knolls
  • San Lorenzo
  • Sunol

Contra Costa County

  • Antioch
  • Brentwood
  • Clayton
  • Concord
  • Danville
  • El Cerrito
  • Hercules
  • Lafayette
  • Martinez
  • Moraga
  • Oakley
  • Orinda
  • Pinole
  • Pittsburg
  • Pleasant Hill
  • Richmond
  • San Pablo
  • San Ramon
  • Walnut Creek

San Mateo County

  • Atherton
  • Belmont
  • Brisbane
  • Burlingame
  • Colma
  • Daly City
  • East Palo Alto
  • Foster City
  • Half Moon Bay
  • Hillsborough
  • Menlo Park
  • Millbrae
  • Pacifica
  • Portola Valley
  • Redwood City
  • San Bruno
  • San Carlos
  • San Mateo
  • South San Francisco
  • Woodside

Frequently Asked Questions

  • How often does a backflow prevention device need to be tested?

    Backflow prevention devices should be tested regularly to make sure they are functioning properly and protecting your clean water supply. Testing requirements can vary based on the property and local regulations, and some systems require annual testing. Monarch Plumbing and Rooter can test your backflow device and provide documentation for applicable compliance requirements.

    Schedule Service

  • What happens if a backflow prevention device fails a test?

    If a backflow prevention device fails testing, it may need to be repaired, rebuilt, or replaced depending on its condition. Monarch Plumbing and Rooter can identify the cause of the failure and perform the necessary repairs or replacement to help restore proper protection and keep your plumbing system compliant.

    Schedule Service

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