Worcester Bosch T-Piece 18mm 87186804320

The Worcester Bosch 87186804320 is an 18mm T-piece that forms part of the pipework and hose assembly on Worcester Bosch Greenstar Highflow combi boilers. It divides a single pipe run into two branches, directing flow to the components connected downstream. As a serviceable pipe fitting it sits within the Pipes & Hoses spare part group and is replaced when the joint itself begins to leak, corrode or restrict flow.

• Water weeping or dripping from the T-piece joint or its connections
• Visible corrosion, scale build-up or hairline cracking on the fitting body
• Damp staining, mineral deposits or crusting on pipework and components around the T-piece
• System pressure dropping with no other obvious source of loss
• Restricted or uneven flow at the branch fed by the T-piece

• Check the GC number on the appliance data plate against the compatibility list to confirm the model variant.
• Confirm the alternative number 1022566 matches the part currently fitted before ordering.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.