The special siphon - Suction-side type fills and closes automatically and is suitable for draining HVAC-devices at coolers, humidifiers or other wet areas which operate at a lower pressure than that of the surrounding environment.

• With in-line floating ball used as a back-pressure valve
• Screwed cap for inspection purposes
• Suitable for a maximum negative pressure difference P = 2900 Pa
• Constructed of polypropylene (PP)
• Water supply connection via screwed crimp joint or rubber sleeve for device outlets of  ¾", 1", 1¼", 1½"
• Outlet diameter 40 mm
• Variable outlet construction with two-sided thread connection and adjustable 
• installation height
• The siphon should not be connected directly to the drains but allowed to discharge freely. 
• The overall height can be reduced by installing the upright stand pipe at an angle.