1. This top-down source series product does not contain copper and can be directly used in restricted environments;2. It has multiple specifications and is willing to be used in various chlorine-containing systems;3. The circulation performance is improved, and the flow rate of the same capacity as the inner diameter of the chlorine pipe can be passed;4. Plugging and unplugging the tube is simple and convenient, and the quick-connect part of the oxygen tube is safe, reliable and durable.