- Backflow Seal Diameter DN 50 with Lockable Non-return Flap
- Connection diameter: 50 mm
- Tested and approved by TÜV Rheinland with CE Mark – conforming to European Standard: EN 13564.1 2009 and EN 1455
- Backflow valve with stainless steel pad rodent safe, extends the life of the locking mechanism
- With emergency lock (red turning lever) and has an automatic valve