Grant Boiler MPCBS124 Pressure Relief Valve 3 Bar - Old Part MPCBS50

If you have a Grant Boiler and you’re finding that your pressure relief valve is dripping or your combi boiler is losing pressure you may have an issue with your pressure relief valve. A pressure relief valve works as a safety device on a boiler to prevent a build-up of pressure within a sealed heating system. For example if the hose going to the expansion vessel becomes blocked or the expansion vessel itself fails the pressure in the heating system will build up as the water has nowhere to expand.

Common causes of pressure relief valve failure can be the bladder within the expansion vessel failing or the expansion vessel hose can become blocked. A way of checking the expansion vessel is removing the cap of the Schrader valve and testing the pressure within the vessel, if water comes through the valve the vessel has failed. Once a pressure relief valve has started passing water it is good practice to change the valve along with the part that has failed within the boiler.

This pressure relief valve is 3 Bar and replaces the old Grant Boiler part MPCBS50 which was 2.5 Bar.

Compatible with the following Grant Boiler models:

• Grant Combi V3 Internal
• Grant Vortex Pro Condensing Kitchen and utility models
• Grant Vortex Pro Condensing combi internal and external boilers
• Grant Vortex Eco Wall hung model
• Grant product code: MPCBS124 (replaces old part MPCBS50)