Worcester Bosch T-Piece Return Manifold LH Side Of Pump 87155021140

The Worcester Bosch 87155021140 is a T-piece return manifold that mounts on the left-hand side of the circulating pump. It forms part of the hydraulic pipework on Worcester Bosch and Worcester British Gas Greenstar boilers, joining the heating return pipework into the pump inlet.

The manifold is a moulded pipework component with three connection points, which is where the T-piece description comes from. It carries returning system water back towards the pump and heat exchanger, so a sound, leak-free joint at this point matters for correct circulation and system pressure.

• Weeping or dripping from the manifold body or its connections at the left-hand side of the pump
• Visible corrosion, scale build-up or pitting on the pipework
• Water staining, crusting or damp patches around the pump area
• Gradual loss of system pressure that cannot be traced to another component
• Pump noise or vibration linked to restricted or aerated flow through the return pipework

• Check the GC number on the appliance data plate and match it against the compatibility list before ordering.
• Confirm the part number 87155021140 or the alternative number 1013113 against the old component.
• Have the correct sealing washers or gaskets to hand so the manifold can be refitted without leaks.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.