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 150 (NPS 6) Max. Flow Velocity 2 m/s (6.6 fps) Weight 2.6 kg (5.7 lb) # Bolt holes (#B) 2 Bolt Circle Diameter (BCD) 261 mm (10.3 in) Dimension 144.5 mm (5.7 in) Valve body length (L) 300 mm (11.8 in) Outer Ø (OD) 144.5 mm (5.7 in) OD incl. gasket (ODG) 160.5 mm (6.3 in) Ø Bolt Holes (ØB) 8.5 mm (0.3 in) Max. Flow Volume 36 l/s (570.6 GPM) Max. ID Host Pipe 159 mm (6.3 in) Min. ID Host Pipe 146 mm (5.7 in) Watertightness EN 13564 Fasteners mtrl. 316L stainless steel Gasket EPDM Product sheet (PDF) Technical specification (PDF) Dimensional drawing (PDF)