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Main Gas Valve Washer 3/4 Inch 5111404

Main

Main Gas Valve Washer 3/4 Inch 5111404

3/4 inch washer for the gas valve on Main Multipoint FF and Multipoint FF ErP water heaters.

At a glance

  • Part type: washer for the gas valve
  • Also known as 1160786
  • Gas-carrying components must be worked on by a Gas Safe registered engineer
Manufacturer part no.
5111404
GC number
H18-932
Showing prices

£9.73

£8.11 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 3/4 inch washer for the gas valve assembly, manufactured by Main under part number 5111404. It seats within the gas valve joint on the Multipoint FF range of water heaters, where it forms the seal that keeps the connection gas-tight. It is a serviceable sealing component, replaced when the joint is broken down or the washer no longer seals.

Signs this part needs replacing

  • A gas smell or detectable leak at the gas valve joint
  • Soapy water test showing bubbles at the valve connection
  • Dampness, staining or corrosion around the gas valve body
  • The washer is flattened, cracked, hardened or perished when the joint is opened
  • The joint will not seal reliably after the gas valve has been dismantled and reassembled

Before you order

  • Confirm your appliance model against the manufacturer's parts list before ordering
  • Check the gas valve assembly to confirm the washer size and its position in the joint
  • Isolate the gas supply before any work on the gas valve
  • Gas-carrying components must be worked on by a Gas Safe registered engineer

Not sure which part?

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