The Sievert 8716 Neck and Valve Assembly is a precision gas torch valve designed for direct connection to Primus 2000 cylinders, providing accurate flame control for professional heating and brazing applications. This neck tube valve features an integrated back pressure valve that significantly reduces the risk of dangerous flare-ups during operation, making it a safer choice for demanding trade environments. The assembly accepts burners with an M8 x 0.75 thread specification, ensuring compatibility with multiple Sievert burner models including the 8725, 8719, 8720, and 8842. Ideal for plumbers, heating engineers, and metalworkers who require consistent flame control and reliable gas flow regulation, this valve assembly offers the precision needed for soldering copper pipes, brazing metal components, and heat shrinking applications. The direct cylinder connection eliminates the need for additional hose assemblies, providing a compact and efficient torch setup. Features and Benefits: • Back pressure valve reduces flare-up risk for safer operation • Direct connection to Primus 2000 cylinders for precise flame control • M8 x 0.75 thread compatible with multiple Sievert burner models Specifications: Torch Type: Gas Torch