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Regin O-Ring Imperial REGQ729

Regin

Regin O-Ring Imperial REGQ729

Imperial O-ring from Regin, sized 1 5/8" x 3/16" (40.65 mm x 5.33 mm), for sealing joints in heating and plumbing assemblies.

At a glance

  • Also known as 4271166
Manufacturer part no.
REGQ729
Showing prices

£3.08

£2.57 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 Regin REGQ729 is an imperial O-ring sized 1 5/8" x 3/16" (40.65 mm x 5.33 mm). It is a circular sealing ring that sits in a groove or joint face to stop water or air escaping once two components are assembled. It forms part of the Regin consumables range used across heating and plumbing work.

Signs this part needs replacing

  • Visible cracking, perishing or flattening of the ring
  • Water weeping or dripping from the joint the O-ring seals
  • The ring has hardened and no longer springs back when squeezed
  • Staining or water tracking around the joint face
  • Leaks that return shortly after the joint is tightened

Before you order

  • Measure the old O-ring's inside diameter and cross-section and match them to 40.65 mm x 5.33 mm
  • Check the groove or seat is clean and free from scoring before fitting a new ring
  • Confirm the ring material suits the system it will seal

Not sure which part?

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