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Potterton O-Ring 5138682

Potterton

Potterton O-Ring 5138682

NBR O-ring measuring 11.91mm x 2.62mm, supplied as a Potterton boiler spare for Potterton Commercial Sirius SAT Rs2Z appliances.

At a glance

  • Appliance family: Potterton Commercial spares
Manufacturer part no.
5138682
Showing prices

£4.68

£3.90 ex. VAT · VAT at 20%

Available to order · 3 working days
Available to order · 3 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 Potterton 5138682 is an O-ring supplied in NBR (nitrile butadiene rubber) with stated dimensions of 11.91 mm x 2.62 mm. It is a sealing component used within Potterton Commercial boiler assemblies, sitting in the O-rings, washers and gaskets category of gas boiler spares. Its role is to form a compression seal at the joint where it is fitted, preventing fluid loss.

Signs this part needs replacing

  • Water or system fluid weeping from the joint the O-ring seals
  • The existing ring is hardened, cracked or flattened once the joint is opened
  • Rubber that has swollen, perished or lost elasticity
  • Dripping that continues after the joint has been correctly re-tightened
  • Scale, residue or corrosion marking at the sealing face

Before you order

  • Confirm the appliance is a Potterton Commercial Sirius SAT Rs2Z
  • Compare the stated dimensions of 11.91 mm x 2.62 mm against the O-ring being replaced
  • Check the part number 5138682 against the existing component or the appliance documentation
  • Consider whether any other seals at the same joint should be renewed at the same time

Not sure which part?

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