Popular Cylinder
Popular Cylinder Spares Pressure Relief Valve 6 Bar HRP0186
6 bar pressure relief valve with a 3/4 loose nut connection to 1/2 BSP, for unvented cylinder cold water inlet controls.
£35.88
£29.90 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
A 6 bar pressure relief valve manufactured by Popular Cylinder Spares for unvented cylinder cold water inlet controls. It relieves excess pressure from the cylinder and its associated cold water supply components, opening at the rated 6 bar set pressure. The valve connects by a 3/4 loose nut to a 1/2 BSP thread.
Signs this part needs replacing
- Water discharging continuously from the tundish with no heat-up or draw-off demand
- The valve weeping or dripping from the outlet during normal operation
- System pressure failing to hold at the correct level, with repeated top-ups needed
- Visible scale, corrosion or debris around the valve seat or outlet
- Discharge occurring well below the rated 6 bar set pressure
Before you order
- Confirm the cylinder requires a 6 bar relief valve and not a different set pressure
- Check the connection arrangement matches a 3/4 loose nut to 1/2 BSP
- Verify your appliance model against the manufacturer's parts list before ordering
- Confirm the valve is being fitted to the cold water inlet control group on an unvented cylinder
Compliance
| Alternative numbers | HRP0186 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALBION Stainless Unvented Cylinder | — | — | — | |
| ALLBRITE Solar Unvented | — | — | — | |
| CASTLE Stainless Steel | — | — | — | |
| CROWN Endurance Stainless Steel | — | — | — | |
| FERROLI Aquacyl | — | — | — | |
| GLOWWORM Aquacyl Unvented | — | — | — | |
| GRANT DuoWave HP Direct 170 Litre | — | — | — | |
| GRANT DuoWave HP Direct 200 Litre | — | — | — | |
| GRANT DuoWave HP Direct 250 Litre | — | — | — | |
| GRANT DuoWave HP Direct 300 Litre | — | — | — |
Showing 10 of 90 compatible appliances.
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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Not sure which part?
Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.