Product Name: Aetv Brass Anti-Siphon Vacuum Breaker Valve Safety Valve Model NO.: A199 Material: Brass Structure: Automatic Closed: Semi-Closed Pressure: Non-Ajustable Connection: Thread Temperature: Ordinary Temperature Certification: ISO Media: Gas Trademark: Aetv Transport Package: Box Specification: DN15 / DN20 Origin: China HS Code: 84814090 Product Description AETV is a Valve Manufacturer.The main products are bronze safey valves ,stainless steel 304/316 safety valves, air vent valves,pressure reducing valve,water filling valve,needle valve,breather valve,temperature and pressure relief valve.Brass anti-siphon vacuum breaker valve