Waterflow Detectors DN25 – DN50 Products / Meters & Switches / Waterflow Detectors DN25 – DN50 Enexia Logotyp Approvals Data Sheet (in English) System Sensor WFDT waterflow detector Fits 1″ (DN25) threaded tees or mechanical tees/li> Pipe sizes 1˝ (DN25), 1¼ (DN32), 1½ (DN40) ja 2˝ (DN50) Twelve flexible plastic paddles with sizes marked Vertical or horizontal installation Durable housing