What is the purpose of a vacuum breaker?

The purpose of a vacuum breaker is fundamentally tied to the prevention of back-siphonage in plumbing systems. Back-siphonage can occur when there is a drop in pressure within the water supply system, which can lead to potentially contaminated water being drawn back into the clean water supply. A vacuum breaker is designed to keep the system safe by allowing air into the plumbing system when the pressure drops, thereby breaking the vacuum that could allow contaminated water to flow back.

This device is typically installed on plumbing fixtures, hose bibs, and irrigation systems to protect the potable water supply. By effectively preventing back-siphonage, vacuum breakers play a crucial role in maintaining the integrity of the drinking water supply and safeguarding health.