The Worcester Bosch sensor for the flow regulator valve in Greenstar, Greenstar 8000 Life, Greenstar 8000 Style, and Greenstar Er P boilers. The bypass valve, or flow regulator, controls the direction and flow rate of fluid in heating and plumbing systems. These valves can act as check valves, helping to prevent the drift of fluids into the wrong areas of a system.

Brand Name	Worcester Bosch