Product Name: Hot or Cold Water Bronze Anti-Siphon Vacuum Breaker Model NO.: A197 Material: Bronze Structure: Spring Closed: Closed Pressure: Adjustable Connection: Thread Temperature: Ordinary Temperature Certification: CE Trademark: Aetv or OEM Transport Package: Plastic Bag--Box--Carton--Case Specification: 3/8"-2" Origin: Jiangsu Pronvince, China HS Code: 84814000 Product Description Specificationssize:1/2" --2"available material:bronze / stainless steel 304Max Pressure:16barApplication:The anti-siphon small bronze vacuum breaker valvesare widely used in many kinds of systems where vacuum is so easily produced. It opens to permit air to enter when there is a pressure drop.ParametersWorking pressure:16barSealing pressure:0.1barWorking temperature:-40°C~180°CSuitable fluids:Water Intermixture of water and glycol(density lower than 50%)Connection: male