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Hamworthy O-Ring 742121186

Hamworthy

Hamworthy O-Ring 742121186

Nitrile O-ring with a 53.7 mm internal diameter, 70 Shore, for Hamworthy Purwell Variheat floor-standing boilers.

At a glance

  • Also known as 2064868
Manufacturer part no.
742121186
Showing prices

£4.20

£3.50 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 nitrile O-ring with a 53.7 mm internal diameter, supplied by Hamworthy under part number 742121186. It is a 70 Shore hardness sealing ring used within the Purwell Variheat range of floor-standing gas boilers. The O-ring forms the seal at the joint where it is fitted, preventing water or gas leakage across the mating faces.

Signs this part needs replacing

  • Visible cracking, flattening or hardening of the ring
  • Weeping or dripping at the joint the O-ring seals
  • The ring sits loose in its groove or has lost its round section
  • Discolouration or swelling consistent with chemical or heat degradation
  • A joint that has been disturbed during servicing and cannot be re-sealed

Before you order

  • Confirm the appliance model against the fit list above
  • Check the internal diameter and cross-section of the ring being removed against the dimensions listed
  • Verify that nitrile is suitable for the fluid and temperature at the point of fitment
  • Confirm the part number 742121186 matches the ring removed

Not sure which part?

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