FlowTex Dewatering Bags & Tubes

The FlowTex range of geotextile dewatering bags and tubes is manufactured in South Africa by Geosynthetics Africa, engineered specifically to address the limitations of generic dewatering products that have dominated the local market for decades. Two distinct fabric technologies are offered under the FlowTex brand, each suited to different slurry types, dewatering durations, and solids loading conditions. FlowTex HF uses a high-strength woven slit film polypropylene fabric for general and high-volume dewatering applications. FlowTex Mono uses a woven monofilament polypropylene fabric engineered for non-clogging performance in fine-grained, fines-rich, and long-duration applications where standard slit film products fail to maintain adequate flow rates.

The FlowTex slit film range is produced in four fabric grades from 30 kN/m up to 105 kN/m biaxial tensile strength, with UV-stabilised threads and reinforced infill ports as standard across all grades. The highest grade at 105 kN/m biaxial represents a tensile specification substantially beyond the 58 kN/m uniaxial maximum available from most locally sourced slit film dewatering products. This strength differential is critical when filling large-diameter tubes at high internal pressures, where fabric and seam failure presents both an operational and safety risk. FlowTex slit film is suited to construction site dewatering, stormwater sediment management, medium-volume slurry containment, and applications where coarser particle retention is acceptable.

FlowTex Mono is built on a premium monofilament woven polypropylene fabric with a controlled opening size of 180 microns and a three-dimensional pore structure that resists particle blinding under sustained solids loading. Unlike slit film fabrics, where flat polypropylene tape creates a planar pore geometry prone to progressive clogging, the monofilament weave maintains consistent hydraulic performance through the full dewatering cycle. This makes FlowTex Mono the correct specification for mine tailings, fine clay slurries, biological sludges, and any application where dewatering time and effluent quality are critical. FlowTex Mono also offers superior mechanical durability, with 40 kN/m tensile strength and enhanced seam construction suited to demanding site conditions and multi-fill applications.

All FlowTex bags and tubes are manufactured to project-specific dimensions, with standard sizes held in stock for immediate dispatch and custom fabrications available for larger tube installations. As a South African manufacturer, Geosynthetics Africa offers lead times that imported alternatives cannot match, with direct technical support, polymer programme guidance, and on-site sizing assistance included as part of the supply relationship. FlowTex products are supplied across South Africa, Namibia, Botswana, Zimbabwe, Zambia, Mozambique, Tanzania, Kenya, and the broader sub-Saharan region.