Telescoping valves are designed to control the height of liquid within a pond,reservoir, or other holding chamber. In modern sewage treatment facilities,  water treatment plant one specific use is to control the level of effluent in settling basins. Also called Decanting Valves or Sludge Draw-off Valves, the assembly consists of a drain tube which can slip up and down inside a stationary vertical pipe. Through a lifting device, the tube is raised and lowered to maintain the desired level within the chamber.

Telescoping valves are designed to control the height of liquid within a pond,reservoir, or other holding chamber. In modern sewage treatment facilities,  water treatment plant one specific use is to control the level of effluent in settling basins. Also called Decanting Valves or Sludge Draw-off Valves, the assembly consists of a drain tube which can slip up and down inside a stationary vertical pipe. Through a lifting device, the tube is raised and lowered to maintain the desired level within the chamber.