Popular Cylinder
Popular Cylinder Oso Immersion Box Key HRP0307
Immersion box key for Oso and Popular Cylinder cold water inlet controls, suitable for the listed appliances.
£107.52
£89.60 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 Oso Immersion Box Key is a service tool for cold water inlet controls on Oso and Popular Cylinder appliances. Manufactured by Popular Cylinder Spares, it is used when working on the immersion box assembly during maintenance or repair. This key is part of the Popular Cylinder Spares cold water inlet controls range.
Signs this part needs replacing
- The key slips or fails to grip the immersion box when turned.
- Visible rounding or deformation of the key's flats.
- Corrosion, cracking, or other damage to the key body.
- The key is lost or missing, preventing servicing of the immersion box.
- Difficulty removing or refitting the immersion box during maintenance.
Before you order
- Check the cylinder model against the Fits list to confirm compatibility.
- Confirm the immersion box type on your appliance.
- Ensure you need a key for cold water inlet controls.
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ATMOS Twin Coil Solar | — | — | — | |
| OSO 16 RD | — | — | — | |
| OSO 16 RI | — | — | — | |
| OSO 20 RD | — | — | — | |
| OSO 20 RI | — | — | — | |
| POPULAR CYLINDER SPARES Cold Water Inlet Controls | — | — | — |
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.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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