About Us

Hello my name is Matt Graef

I started Mr. Backflow in 2013, but I have been testing backflows in the Santa Maria Valley and surrounding areas since 2006. After working for a locally owned plumbing shop for eight years, I decided to open my own testing company. I wanted to specialize in testing and repairing backflows, to do one thing and do it well. In 2017 my wife, Sara, took over the administration side of Mr. Backflow. This has allowed me to spend more time with our customers in the field and growing our business.

We would welcome the opportunity to earn your trust and deliver you the best service in the industry.


Matthew J. Graef of Mr. Backflow currently holds the following certifications:

  • American Backflow Prevention Association certified tester #05-00768
  • California Contractors Licence #984926
  • City of Santa Maria tester #0-138g
  • San Luis Obispo County tester #130
  • Santa Barbara County tester #05-00768
  • Golden State Water tester #05-00768

If you don't see your water provider on the list, call me! It is usually just a matter of making a phone call and e-mailing a few certifications.


Whenever you need us. Call to schedule any time. Have a backflow emergency? Don't hesitate to call (805) 588-0785