Most homeowners never notice vacuum breakers unless there is a plumbing inspection, irrigation installation, or backflow issue. However, these small plumbing devices play an important role in helping protect clean drinking water from contamination.
Vacuum breakers are a type of backflow prevention device designed to stop contaminated water from flowing backward into a home’s potable water supply.
What Is a Vacuum Breaker?
A vacuum breaker is a plumbing safety device that helps prevent back-siphonage, which occurs when water unexpectedly reverses direction inside a plumbing system.
If water pressure suddenly drops due to a water main break, firefighting activity, or another pressure-related event, contaminated water could potentially be pulled backward into the clean water supply without proper protection.
Vacuum breakers help stop this by allowing air into the system when pressure changes occur, which breaks the siphon effect and prevents contaminated water from being drawn into the drinking water supply.
Where Are Vacuum Breakers Commonly Used?
Vacuum breakers are commonly installed on:
- Outdoor hose bibs
- Irrigation and sprinkler systems
- Commercial plumbing fixtures
- Toilets and urinals
- Utility sinks
- Some outdoor plumbing systems
These devices are especially important anywhere a hose or plumbing fixture could come into contact with contaminated water sources.
Why Backflow Protection Matters
Without backflow prevention devices, contaminated water containing chemicals, bacteria, fertilizers, pesticides, or wastewater could potentially enter the public water supply during pressure changes.
For example, if a garden hose is submerged in standing water, pool water, or chemicals while water pressure drops, contaminated water could siphon backward into the plumbing system without proper backflow protection.
Types of Vacuum Breakers
There are several different types of vacuum breakers used in plumbing systems.
Atmospheric Vacuum Breakers
Atmospheric vacuum breakers are commonly installed on outdoor faucets and irrigation systems. These devices allow air into the system when pressure drops occur to help prevent contamination.
Pressure Vacuum Breakers
Pressure vacuum breakers are designed for systems that remain under constant pressure, such as many irrigation systems.
These systems often include additional internal components and may require periodic testing or inspection.
Plumbing Codes Often Require Backflow Protection
Many plumbing codes require vacuum breakers or other backflow prevention devices on certain plumbing fixtures and irrigation systems to help protect public water supplies.
Because these devices help protect both individual homes and municipal water systems, proper installation and maintenance are important.
Professional Backflow and Plumbing Services in Savannah
At Henry Plumbing, we help homeowners and businesses throughout Savannah with plumbing inspections, backflow prevention, irrigation plumbing, water line services, plumbing repairs, and code-compliant plumbing installations. Proper backflow protection helps keep drinking water systems safe and reliable for homes and businesses alike.
