Bay Area Backflow Testing & Repair

What Is Backflow?

Backflow happens when water flows the wrong way in your plumbing — back toward the public water main instead of into your home or business. At cross-connections, where drinking water meets another source, this can pull contaminants into the clean water supply.

Common Cross-Connections

• Garden hoses submerged in pools or chemical sprayers
• Irrigation systems tied to potable water lines
• Fire sprinklers, boilers, or industrial equipment

A main break, firefighting draw, or equipment failure can cause pressure drops that allow polluted water to flow backward through these connections.

Why Testing Is Required

One unprotected cross-connection can affect an entire neighborhood. That's why California municipalities and water agencies require approved backflow prevention assemblies on commercial and residential properties.

These devices work like a one-way valve — water comes in, but can't flow back out into the public system. California's Cross-Connection Control Policy Handbook sets the standards for when devices are required and how they must be tested.

Services

• Annual backflow prevention assembly testing
• Repair and replacement with approved devices
• New installation for residential and commercial properties
• Documentation filed directly with your water provider

Why North Coast Backflow

• Owner-operated — you work directly with your certified tester
• Serving the entire San Francisco Bay Area
• Fast scheduling and same-week appointments
• Paperwork handled and submitted for you