Who Is Required to Have a Backflow Preventer?

The General Rule: Cross-Connections Require Protection

Any property that has a cross-connection — a physical link between the public water supply and any source of potential contamination — is required to have an appropriate backflow preventer. In practice, this means virtually all non-residential properties and many residential ones.

Properties Typically Required to Have Backflow Prevention

• Commercial and retail buildings
• Office buildings
• Industrial and manufacturing facilities
• Restaurants and food service operations
• Hotels and hospitality properties
• Healthcare facilities (hospitals, clinics, dental offices)
• Schools and universities
• Multi-family residential buildings (apartments, condominiums)
• Car washes
• Laundromats and dry cleaners
• Any property with a fire sprinkler system connected to the public water supply
• Any property with an irrigation or landscaping system
• Residential properties with pools, spas, or irrigation systems

What Level of Protection Is Required?

The specific type of backflow preventer required depends on the degree of hazard present. Water authorities classify connections as low hazard or high hazard. High-hazard connections (chemicals, sewage, irrigation) require a Reduced Pressure Zone (RPZ) assembly. Low-hazard connections may be adequately protected by a Double Check Valve Assembly (DCVA). Your water authority's cross-connection control program determines the specific requirement for your property.

How Do I Know What's Required for My Property?

Your water authority's cross-connection control (CCC) program can tell you the specific requirements for your service address. Our certified testers are familiar with the requirements of all local water authorities in our service area and can advise you. We can also review your existing equipment and confirm it meets current requirements.