Bosch safety relief valve 3 bar: original Bosch spare part, type: Safety relief valve. Application: Boiler (HRC 26). Manufacturer number: 87174010120; Instalpunt article number: 8181340.
According to the Bosch parts lists, this part fits 63 models, including Bosch 24 VRC (Gesloten ZWE24-3MFA), Bosch HR 42 TOP (ZWB11-42A23S3600) and Bosch HRC 26. The full list is under “Fits”.
This item is in stock and usually arrives within 3–5 working days.
Check the rating plate of your appliance before ordering; if in doubt, ask the manufacturer or your installer. Work on gas-carrying parts must be carried out by a qualified gas engineer.




