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Main O-Ring Screw Under Volumetric Water Governor 5110978

Main

Main O-Ring Screw Under Volumetric Water Governor 5110978

O-ring for the screw under the volumetric water governor on Main Multipoint BF water heaters.

At a glance

  • Part type: O-ring
  • Also known as 1160657
Manufacturer part no.
5110978
GC number
H18-262
Showing prices

£30.42

£25.35 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

This is a Main O-ring that seats on the screw under the volumetric water governor. It forms the water-tight seal at that screw point on the governor assembly. It is listed for the Main Multipoint BF water heater family.

Signs this part needs replacing

  • Water weeping or dripping from around the governor screw
  • Damp staining, corrosion or limescale tracking at the screw head
  • The O-ring is flattened, cracked, hardened or swollen
  • Water volume setting drifts or cannot be held steady
  • The screw shows corrosion where the seal has failed

Before you order

  • Confirm your appliance is a Main Multipoint BF or Multipoint BF ErP
  • Check the GC number on the appliance data badge against the model listed
  • Isolate the water and gas supplies before opening the governor assembly
  • Inspect the screw and governor body for damage before refitting the O-ring

Not sure which part?

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