Dry odorless, self-sealing siphon HepvO PP DN40 WT40 3018902

The hygienic alternative to a pipe siphon. As a dry (waterless) drain valve, the HepvO uses a specially designed diaphragm to create an airtight seal between the living space and the sewage system. The self-sealing valve opens under the pressure of the flowing sewage and closes tightly when the flow ceases under normal atmospheric conditions.