Hamworthy
Hamworthy O-Ring 71.4mm Internal Diameter 742121238
Nitrile 70 O-ring with a 71.4 mm internal diameter, listed as Hamworthy part 742121238 for Purwell Variheat PV boilers.
At a glance
- Also known as 2064864
£5.23
£4.36 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Hamworthy 742121238 is an O-ring with a listed internal diameter of 71.4 mm, moulded in nitrile (NBR) at 70 Shore hardness. It is used as a sealing component on Hamworthy Purwell Variheat PV floor-standing gas boilers, seating in a recess to prevent water or air loss at the joint it serves.
Signs this part needs replacing
- Water weeping or dripping from the joint or housing the O-ring seals
- The ring is flattened, cracked or visibly hardened when removed
- The ring has lost elasticity and does not spring back when compressed
- Scale, sludge or debris embedded in the sealing face
- Repeated pressure loss or air ingress traced back to that joint
Before you order
- Confirm the internal diameter matches the recess on the appliance, 71.4 mm
- Check that nitrile 70 is suitable for the fluid and temperature at that point in the system
- Verify the appliance model against the Purwell Variheat PV list above
- Inspect the sealing recess for corrosion, scoring or damage before fitting a new ring
Compliance
| Alternative numbers | 2064864 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| HAMWORTHY PURWELL VARIHEAT PV105HE FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV110C FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV125HE FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV140C FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV180C FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV65HE FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV70C FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV85HE FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV95C FLOOR STANDING | — | — | — |
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
HAMWORTHY appliance manual — PURWELL VARIHEAT PV105HE FLOOR STANDING, PURWELL VARIHEAT PV125HE FLOOR STANDING, PURWELL VARIHEAT PV65HE FLOOR STANDING, PURWELL VARIHEAT PV85HE FLOOR STANDING
manualmanualHAMWORTHY appliance manual — PURWELL VARIHEAT PV110C FLOOR STANDING, PURWELL VARIHEAT PV140C FLOOR STANDING, PURWELL VARIHEAT PV180C FLOOR STANDING, PURWELL VARIHEAT PV70C FLOOR STANDING, PURWELL VARIHEAT PV95C FLOOR STANDING
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