JET Filter System LLC provides various sizes and materials for weep hole filter valves, primarily used for concrete and steel seawalls, sheet piling, retaining walls, and bridge abutments. Product offerings include 316 stainless steel and ABS filters in diameters from 2 1/2 to 6 inches and lengths from 4 to 8 inches, available in stainless steel, powder coated steel, or colors like slate, gray, brown and clay. They also offer geocomposite wick drainage systems and geotextile filtration and erosion control products.