Kessel backflow stop KE73052 Staufix siphon DN 50 made of plastic Kessel backflow double lock Staufix siphon DN 50 made of plastic, with two automatically closing Klappen , one of them as a hand-lockable emergency lock. With wall mounting, pipe odor trap for washing / sink units and hose connection. Drain DN 50 horizontal for connection to HT pipe in accordance with DIN 19560. Double backflow stop: Staufix Siphon Standard: DIN EN 13564 Type 5 Drain fitting: white Nominal diameter drain: DN 50 ( 2000 2000 / 4 and 2000 2000 / 2 IG installation type: for washbasins / sinks