Flap Valves

Flap valves: Flap valve especially designed to prevent backflow into sewers and protect properties against flooding.The flap valve is recommended for properties located close to waterways and bodies of water (streams, rivers, embankments, ponds ...) where the surface water is directly discharged through an outfall into the watercourse.

It prevents the water from rising up through the sewer (heavy rain, storms or floods) and causing flooding.


·         Made from glass fibre reinforced isophtal acid polyester and coated in an isophtal acid Gel-Coat, the new MULTI N flap valve design from offers   superior resistance, all while further reducing its weight.

·         The screws and bolts as well as the valve’s axle are made from grade 1.4401 (316) stainless steel and the seal is made out of EPDM.

·         The MULTI N valve can withstand pressures of up to 1 bar and is highly resistant to corrosion, ultraviolet light, thermal shocks and mechanical stress.

·         Flap valves can be equipped, if necessary, with a lifting ring nut for quick and easy handling from a distance.

·         Flap valve can also deliver you purpose-built solutions for your specific applications