SiphonX® is the [[antisiphon device]] from [[Sophysa]]. SiphonX® is an gravitational anti-siphon device, which will act when the patient stands up. In the vertical position, it adds 200 mmH2O to the pressure of the valve.

SiphonX® is available as a stand-alone valve accessory, or can come directly pre-connected to a valve
((http://www.sophysa.com/can-we-use-an-anti-siphon-device-with-the-sophy-and-polaris-valves_67_5.html)).