PVC tube settlers for solid liquid separation in water and wastewater treatment plants Is called Tube Settler Media. It is a very high efficiency solid-liquid separator. This is due to the fact that its shape is hexagonal-chevron type that has got highest efficiency of separation among all other shapes available i.e. square, rectangular or hexagonal. Its area of application includes primary and secondary settling in water as well as wastewater treatment plants with any type of secondary treatment. It is also being very successfully used along with anaerobic digesters, to control the outflow of sludge and enhance gas production.

Traditional sedimentation tanks or clarifiers are large structures, occupying much valuable space, are perceived as high investment cost items. Tube Settler media helps to reduce the amount of suspended solids in carrier fluids ; thus improving effluent quality ; which in turn improves the efficiency of existing plants.