The WaStop Inline check valve installs in stormwater systems and outlets, providing immediate protection against flooding and backflow. Its unique, simple, and effective design also prevents unwanted odour, especially at outlets in tidal environments. The standard variant is supplied with an EPDM gasket and mounting tabs. Technical specification Nominal diameter DN 200 (NPS 8) Max. Flow Velocity 2 m/s (6.6 fps) Weight 4.5 kg (9.9 lb) # Bolt holes (#B) 2 Bolt Circle Diameter (BCD) 350 mm (13.8 in) Dimension 215 mm (8.5 in) Valve body length (L) 450 mm (17.7 in) Outer Ø (OD) 215 mm (8.5 in) OD incl. gasket (ODG) 235 mm (9.3 in) Ø Bolt Holes (ØB) 8.5 mm (0.3 in) Max. Flow Volume 80 l/s (1268 GPM) Max. ID Host Pipe 233 mm (9.2 in) Min. ID Host Pipe 216 mm (8.5 in) Fasteners mtrl. 316L stainless steel Gasket EPDM Product sheet (PDF) Technical specification (PDF) Dimensional drawing (PDF)