We are a family owned and operated business.

Licensed, Bonded, and Insured.

We specialize in Backflow Prevention Assembly Testing, Repair, and New Installation.

Cal-Oso Backflow is now offering services in Plumbing and Pipeline.

Residential, Commercial, Industrial, Fire, and Irrigation Services

Over 8 years in experience with water utilities.

Cal-Oso Backflow Services takes great pride in serving Riverside, San Diego, San Bernardino, Orange, and Los Angeles Counties.

Ready To Service Your Backflow?

Contact Us For A Free Quote