Worcester Bosch Return Unit 8716117425

The Worcester Bosch 8716117425 return unit is a hydraulic component used in the diverter valve and manifold assembly of Greenstar i ErP system boilers. It forms part of the return path in the appliance's water circuit and works alongside the diverter valve to control how flow is directed between heating and hot water operation. The unit is manufactured by Worcester Bosch for the Greenstar i ErP range.

• No hot water at the tap while the heating continues to run normally
• Radiators warming when only a hot water draw-off is called for
• Domestic hot water temperature fluctuating between hot and cold
• Water weeping from the hydraulic block or manifold area
• Diverter valve failing to move cleanly between the heating and hot water positions

• Check the GC number and the appliance serial plate to confirm the correct variant for your boiler.
• The alternative number 1031157 may appear on older documentation or on the component label.
• Inspect the seals and gaskets around the manifold while the unit is removed and renew them if they are worn.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.