The geometries of the syphons in accordance with DIN 16282 are divided into U-form and trumpet form. These syphon versions are available with threaded connection (forms A and C) or weld-in connection (forms B and D) to the process side. In addition to the standardised syphons, connections for NPT threads following DIN 16282 and industrial standard variants are available. Inside the syphon, condensate is collected, which prevents the ingress of hot media into the pressure measuring instrument. It is recommended to fill the syphon with a cooling separating liquid before commissioning the pressure line.

U-form syphons are intended for horizontal pressure tapping; trumpet-form syphons are intended for vertical pressure tapping. The length-optimised compact form minimises the influence of vibrations and protects the pressure measuring instrument from pressure spikes and pulsations. For applications that do not require a syphon, WIKA offers connecting pipes in a straight or angular form (pipe elbow 90°).