Vaillant Remote PRV Mounting Kit is also known as Pressure Relief Valve, PRV, Safety Valves, over flow valve and Expansion Relied Valves. The function of this type of Valve is to relieve the system of over pressure in a safe manner. It is set to open at a predetermined set pressure to stop pressure building up and preventing the expansion vessels and other equipment and from being damaged.
Please always refer to Manufacturers instruction, and get a competent person to carry out any repair to you boiler.
