Profile: Swiveljoints.com specializes in providing swivel joints and repair parts. Sight flow indicators are used in a variety of industries to monitor and verify fluid flow through filtering, cooling, intake and output pumping, as well as other industrial processes. The use of sight flow indicators are the most efficient way to ascertain if and where problems exist at any point along an industrial process line. Sight flow indicators are useful in both new and older power plants to monitor the flow of critical fluids, such as water in cooling lines or lubricants that are pumped to turbines in hydro-electric generators. The petroleum industry utilizes flow indicators to visually monitor drilling pump operations. Indicators provide the operator with a window to show if dirty fluids are being pumped from a down-hole hydraulic cleaning process.