WaBack Residential has been specially adapted for private properties. The product prevents backflow of waste water and surface water. It is installed in basements and homes in low-lying areas where sewer flooding is a risk. The product provides immediate and cost-effective protection against backflow and basement flooding, so you can rest assured that your basement will remain dry. Technical specification Nominal diameter DN/OD 110 (NPS/OD 4) Weight 5 kg (11 lb) Chamber diameter (CØ) 428 mm (16.9 in) Dimension 110 mm (4.3 in) L 570 mm (22.4 in) Min. invert-ground (min. I-G) 335 mm (13.2 in) Closing head 100 mm HO (3.9 inh2o) Pipe connection 110 PE Watertightness EN 13564 Bracket 316L stainless steel Chamber Polyethylene (PE) Damper EPDM Fasteners mtrl. 316L stainless steel Float Polyethylene (PE) Foam Seal Pe-Foam O-ring EPDM Sliding Plate PVC Rubber joint EPDM Product sheet (PDF) Technical specification (PDF) Dimensional drawing (PDF)