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Sime Square Bayonet Joint 6118150A

Sime

Sime Square Bayonet Joint 6118150A

Square bayonet joint for Sime Dewy and Planet Dewy boilers, used at the flue connection point.

At a glance

  • Also known as 2040404
Manufacturer part no.
6118150A
Showing prices

£24.71

£20.59 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The square bayonet joint is a flue connection component manufactured by Sime. It is fitted to appliances in the Sime Dewy and Planet Dewy ranges, where it forms the push-and-twist joint between the flue section and the boiler. Its square profile locates the flue assembly and holds it secure once rotated into position.

Signs this part needs replacing

  • The flue section will not lock positively when twisted into the joint
  • Visible corrosion, staining or heat marking around the joint
  • Flue gas readings drifting or a combustion analyser indicating leakage at the connection
  • The joint feels loose or the flue can be rotated or moved after fitting
  • Cracks, distortion or material loss on the joint body

Before you order

  • Confirm your appliance model against the fitment list above
  • Check whether your flue connection uses a square bayonet joint rather than a round pattern
  • Inspect the existing joint and the flue spigot for damage before fitting
  • Confirm the quantity required for the flue run being worked on

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.