Worcester Bosch Condensate Sump Nut 87133011140

The condensate sump nut is a Worcester Bosch fastening component used on the condensate collection sump of Greenstar gas boilers. It secures and seals the sump connection so that condensate produced during combustion is carried away through the trap and discharge pipework rather than escaping inside the casing. The nut is supplied as a single item under part number 87133011140 and is listed by the manufacturer as a nut within the clips, screws and springs range of boiler spares.

• Condensate weeping or dripping from the sump area, leaving water inside the boiler casing or pooling beneath the appliance
• A visible trail of white condensate residue or scale around the nut and its seating
• The nut has been cross-threaded, rounded or cracked during previous service work
• The sump connection feels loose or cannot be tightened down properly
• Corrosion or pitting on the nut where condensate has been sitting against it

• Check the appliance GC number and model against the compatibility list to confirm this nut is the correct fixing for your sump
• Compare the existing nut with the part number 87133011140 before removing it, particularly where a boiler has been worked on previously
• Inspect the sump seal and washer at the same time, as these are separate items and may also need attention while the sump is open
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.