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 750 (NPS 30) Max. Flow Velocity 4 m/s (13.1 fps) Weight 90 kg (198.4 lb) # Bolt holes (#B) 6 Bolt Circle Diameter (BCD) 896 mm (35.3 in) Dimension 750 mm (29.5 in) Valve body length (L) 1400 mm (55.1 in) Outer Ø (OD) 750 mm (29.5 in) OD incl. gasket (ODG) 778 mm (30.6 in) Ø Bolt Holes (ØB) 10.5 mm (0.4 in) Max. Flow Volume 1768 l/s (28023.4 GPM) Max. ID Host Pipe 767 mm (30.2 in) Min. ID Host Pipe 755 mm (29.7 in) Fasteners mtrl. 316L stainless steel Gasket EPDM Product sheet (PDF) Technical specification (PDF) Dimensional drawing (PDF)