Backwash filter BOXER RDX 1½", DN 40 For installation directly downstream of the water meter system to protect the residential water installation as per DIN EN 806-2. - DVGW-certified - Backwash filter according to DIN EN 13443-1, 19628. Thanks to the transparent filter cylinder, the degree of pollution can visually be determined from the outside at any time. Consisting of: Pre-assembled, rotatable connection flange made of plastic including water meter screw connections made of galvanisation-resistant brass with seals and stainless steel screws. Filter head made of high-strength, flow- optimised industrial plastic, integrated 12-digit date indicator for maintenance according to DIN EN 806-5, including pressure reducer 1 to 6 bar, factory-sett to 4 bar, including pressure gauge 0 – 10 bar, embedded in the filter head for shock-protection, transparent blue filter cylinder, resistant to common household cleaners, including backwash valve, which is low on water hammer and easy to operate – even in case of high water pressure -, child-proof, self-closing backwash valve and drain connection DN 50 according to DIN EN 1717. Filter element made of stainless steel mesh with integrated impeller. Technical specifications: Connection : 1½" R Flow acc. to DIN EN 1567 : 9.1 m³/h Nominal pressure (PN) : PN 16 at 30 °C Pressure reducer adjustable from : 1 – 6 bar Factory setting : 4 bar Pore size : 100 µm Installation length without screw connection: 160 mm Installation length with screw connection : 283 mm Make: Grünbeck