Wastop inline non-return backflow and flood prevention valves are made from stainless steel (304 or 316) with a cone-shaped chloroprene membrane. Designed for inline installation, these valves allow flow in one direction and seal against backflow without relying on gravity or vertical mounting. Standard sizes suit pressures up to 8MwC, with special sizes available.

  • Inline non return valve for backflow and flood prevention in pipework

  • Made from stainless steel (304 or 316) for durability and corrosion resistance

  • Cone-shaped chloroprene membrane seals automatically against backflow

  • Operates in any orientation, not dependent on gravity or vertical installation

  • Range covers standard sizes for up to 8MwC pressure

  • Flanged options for factory fitting to headwalls or outfall walls

Applications

  • Flood prevention in drainage systems

  • Backflow protection in stormwater and wastewater pipes

  • Outfall and tidal wall installations

  • Inline use between existing pipework

  • Retrofitting to precast headwalls

Dimensions

Standard sizes from 100 to 1500mm diameter

Performance

Suitable for pressures up to 8MwC

Materials

Stainless steel (304 or 316), chloroprene membrane

Options and variations

Flanged at one or both ends for factory fitting