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Sime 5139130 Expansion Vessel 1.8 - 3/8" M

Sime

Sime 5139130 Expansion Vessel 1.8 - 3/8" M

Sime 5139130 expansion vessel for gas boilers, supplied with a 3/8-inch male connection.

At a glance

  • Also known as 2040108
Manufacturer part no.
5139130A/SIM
Showing prices

£129.60

£108.00 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 Sime 5139130 is an expansion vessel intended for use within Sime gas boiler installations. It carries the manufacturer designation "1.8" and terminates in a 3/8" male connection. The vessel accommodates the change in system water volume as the boiler heats and cools, helping to stabilise pressure within the heating circuit.

Before you order

  • Confirm the manufacturer part number 5139130 matches the vessel currently fitted or specified for the appliance.
  • Check the connection size and type on the existing vessel is 3/8" male before ordering.
  • Verify the "1.8" designation against the appliance documentation or the markings on the failed vessel, as vessel sizing differs across models.
  • Inspect the mounting arrangement and surrounding pipework for access before removing the old vessel.

Not sure which part?

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