Danboise Mechanical Inc.



Backflow Installation, Service & Testing

Commercial Backflow PreventionMany businesses are required to install, maintain and test backflow prevention devices to avoid contaminated water or chemicals from flowing back into the public drinking water system.

There are four basic types of backflow prevention devices:
  • Atmospheric Vacuum Breaker (AVB)
  • Double Check Valve Assembly (DCVA)
  • Pressure Vacuum Breaker Assembly (PVB)
  • Reduced Pressure Backflow Assembly (RPBA)
Danboise Mechanical is fully licensed and experienced in backflow device design, installation, maintenance and testing of all types of backflow prevention devices. Need a new or upgraded backflow prevention device? Our professionals will create a backflow plan based on our on-site analysis of your property. We will professionally install your new backflow device to our high standards and all codes, test your backflow device and file any required test reports; you’ll never have to worry about anything.

Like all mechanical systems, backflow prevention devices need regular maintenance and testing to make certain that device is working properly. The Michigan State Plumbing Code requires you to have all of your buildings backflow prevention devices tested and re-certified annually.

Danboise Mechanical has a full service team of State Certified Cross Connection Specialists trained in all aspects of installation, replacement, repair and re-certification.

At Danboise, our backflow team of designers, technicians and licensed master plumbers are true backflow professionals with decades of experience.

What Our Customers Are Saying...

"Danboise Mechanical is the Mechanical Contractor that sets the standards by which all other Mechanical Contractors are, or should be, judged. Danboise hires the best Skilled Trades, Managers & Service Technicians and then provides advanced Safety, Skill Sets and Motivational Training to insure the Best Service, Quality and Safety for their Customers. I have been a satisfied Danboise Customer for over 40 years and will continue to employ the Danboise Team on all future Projects."

– Jim Gandol, Gandol Inc.

“My consultancy has a simple, but important, purpose:  to transform individuals and organizations through the power of professional ideals.  Danboise Mechanical has not only embraced that aspiration but operationally has made tremendous strides in making professionalism their organization’s ‘north arrow’.   It has made an already great company that much better.  Whether you’re a long-standing or prospective client I trust you’ll see (and most importantly feel) the difference that a truly professional relationship can bring.”  

– Bill Wiersma Author, The Power of Professionalism

"Whether we need HVAC, Plumbing, Scheduled Maintenance, or after-hours Emergency Service here at Viazanko Construction Services, we make Danboise Mechanical our first call! Their technicians are professional, courteous, and very knowledgeable in their respective fields! Forget calling that other company. Call Danboise first to save you from having to call them later!"

– Robert Viazanko, Viazanko Construction Services L.L.C.

"I've had the good fortune to have worked with Danboise Mechanical Inc.(DMI) for more than 25 years as a Corporate Real Estate Manager for AT&T. Through those years DMI has grown to be an outstanding mechanical contractor offering a wide variety of high quality services and fostered a culture within their team focused on exceeding client expectations. DMI is a strong mechanical contractor providing leading edge technology, for repairs, renovation, new construction, and mission critical projects in a work safe environment. DMI has been a solid partner, executing hundreds of high quality projects while striving to exceed client expectations. It's been my pleasure to work with the DMI team."

– Bernard Fountain, Corp. Real Estate AT&T ret.

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Professional Affiliations






National Electrical Contractors Association