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Main O-Ring 2mm x 15mm Flow Switch Top Connection 5111382

Main

Main O-Ring 2mm x 15mm Flow Switch Top Connection 5111382

2mm x 15mm O-ring for the flow switch top connection on Main Multipoint FF and Multipoint FF ErP water heaters.

At a glance

  • Also known as 1160732
Manufacturer part no.
5111382
GC number
H18-886
Showing prices

£20.69

£17.24 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

A 2mm x 15mm O-ring manufactured by Main for the top connection of the flow switch assembly. It seals the joint at the flow switch top connection, preventing water escaping from the assembly on Main Multipoint FF water heaters. The part is listed under Main part number 5111382.

Signs this part needs replacing

  • Water weeping or dripping from the flow switch top connection
  • Visible flattening, cracking or perishing of the O-ring
  • Scale or debris trapped on the sealing face
  • Water tracking down onto components below the flow switch
  • Flow switch failing to operate correctly where water ingress has affected the assembly

Before you order

  • Confirm the appliance model and GC number against the fitment list above
  • Check the O-ring dimensions on the failed part measure 2mm x 15mm
  • Confirm the leak originates at the flow switch top connection rather than another joint
  • Isolate the water supply and depressurise the appliance before removal

Not sure which part?

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