Worcester Bosch Siphon Assembly 87161138370

The Worcester Bosch siphon assembly, part number 87161138370, is the condensate trap and siphon unit used in the Greenstar i System boiler family. It collects the condensate that forms as flue gases cool within the appliance, holding the discharge until it is released through the connected discharge pipe. Sitting inside the boiler, the trap maintains the water seal that prevents flue gases from passing back through the condensate route.

• Water pooling or dripping around the condensate trap or below the boiler casing
• The appliance locking out or displaying a condensate-related fault
• Cracks, splits or distortion visible on the trap body
• Scale, sludge or debris blocking the siphon so condensate cannot drain away
• Gurgling or bubbling from the condensate route while the boiler is running

• Check the GC number on the appliance data badge against the compatibility list before ordering.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
• Confirm part number 87161138370 or one of the alternative numbers below matches the unit being worked on.
• Inspect the seals and gaskets around the trap and renew them if they are perished or hardened.