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Potterton Return Flange 4 to 5 Section 5140638

Potterton

Potterton Return Flange 4 to 5 Section 5140638

Potterton return flange, part 5140638, for NXR3i commercial boilers in 4 to 5 section configurations.

Manufacturer part no.
5140638
Showing prices

£93.60

£78.00 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 5140638 is a return flange for Potterton Commercial NXR3i boilers, sized for 4 to 5 section builds. It forms the bolted connection between the boiler's return pipework and the heat exchanger or section assembly. The flange provides a sealed, serviceable joint at the return side of the appliance.

Signs this part needs replacing

  • Water weeping or dripping from the return connection during operation or after shutdown
  • Visible corrosion, pitting or scaling on the flange face or mating surface
  • Staining, crusting or limescale tracking around the flange joint
  • A joint that cannot be re-sealed after reassembly due to a distorted or damaged flange

Before you order

  • Confirm the boiler model and section count against the fitment list
  • Check the flange face and mating surface for damage before ordering only a flange
  • Confirm whether the joint gasket and fixings are also required, as these are not supplied with the flange
  • Note the part number 5140638 on the existing component if it is still legible

Not sure which part?

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