Genuine Worcester safety relief valve for Greenstar and Greenstar ErP boilers. Opens at 3 bar to discharge excess pressure and protect the heating circuit.
Function: 3 bar pressure relief (safety) valve (aka PRV)
Colour/variant: Black & red lever style (visuals may vary by batch)
Use: Greenstar/ErP ranges (confirm against appliance GC/FD number)
Installation: Fit by a qualified engineer to manufacturer instructions
What’s included
1 × Pressure Relief Valve – MPN 87186439891
Tip: If your parts database cross-references 87186811630 → 87186439890, this PRV is the current service replacement. Check your model’s parts list to confirm the exact variant.
