Worcester Bosch Isolating Valve Domestic Cold Water 87161082410

The Worcester Bosch domestic cold water isolating valve is a service valve fitted inside the appliance on the cold water feed. It lets an engineer shut off the water supply to the boiler or water heater without draining down the wider system, which keeps servicing and component swaps quick and controlled. It is a Worcester Bosch spare supplied under part number 87161082410 and is used across the Greenstar Heatslave range.

• Water weeping from the valve body or around the spindle when the appliance is running
• The valve will not shut the cold water feed off completely, so water continues to pass during a service
• The handle or spindle is stiff, seized or turns without changing the flow
• Scale, corrosion or staining around the valve, often with a drip trail down the casing
• Water tracking onto nearby electrical components or the appliance base

• Confirm the appliance model and serial number against the compatibility list, as the same valve body is used across several Heatslave variants
• Check the existing part number on the valve or in the manual, and note the alternative number 1015387 when cross-referencing
• Inspect the sealing washers and olives on the pipework while the valve is out and renew them if they are perished or deformed
• Isolate the water and power supplies before removing the valve, and refill and check for leaks before returning the appliance to service