The Worcester Bosch is a replacement pipework elbow with a drain off that is designed for Greenstar and Greenstar Er P boilers. In a boiler, a pipe either allows water into a heating unit, including the mains water supply and the pipework on a wall jig, or is found within an appliance and carries water between the various mechanisms that require it, including the diverter valve and heat exchanger.

Brand Name	Worcester Bosch