Worcester Bosch Diverter Valve Greenstar Highflow 8716118474

The Worcester Bosch 8716118474 is a diverter valve assembly used in Greenstar Highflow combi appliances. It controls the path of water through the appliance, switching the flow between the central heating circuit and the domestic hot water circuit so the boiler delivers the mode being called for. The valve sits within the hydraulics group and is a serviceable component on these models.

• Domestic hot water runs hot then cold, or stays lukewarm regardless of the tap setting
• Radiators warm up when only hot water is being drawn
• No hot water while the central heating is running, or the reverse
• Water weeping from the valve body or around the actuator head
• The appliance locks out or reports a fault when it changes between heating and hot water modes

• Check the model and GC number on the appliance data badge against the compatibility list below before ordering.
• Confirm the number on the existing valve matches 8716118474 or one of the previous numbers listed.
• Inspect the seals and O-rings on the valve housing; a seal kit may be needed if there are signs of scale or weeping.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.