The vacuum breaker is a tool to prevent back flow pressure in a plumbing system. It allows air to enter the water system if syphon attempts to form. When the pressure reduces in the upstream, the valve drops to allow air to enter the system, breaking the syphon. Faucet: 1.3cm Male Connector Hose: 0.6cm Male Connector Vacuum Breaker: 1.3cm & 1.9cm Female Connector
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