Products, Supplies, Equipment & Expertise For Sludge Dewatering & Water Treatment. Spinpro is a factory direct source for polypropylene and polyester geotextile dewatering tubes. Our high capacity Sludge Pro geotextile tubes are available in hanging bags for testing, cubic yard bags and roll off dewatering tubes for smaller projects as well as factory and custom sizes up to 90' circumference X 300' long. Our products also include liners, geo grid, geo membranes, silt fence, erosion control, turbidity curtains and silt screens.