Hydroblock Complete Kit. PLEASE NOTE: This is compatible with boilers which have a serial number beginning with AAZ or ACH. If you have a boiler with a serial number beginning ADH or ADP, you will require hydroblock ICB132002E.
Compatibility
GB24
GB24 SII-Boilers with s/n beginning ACH
GB24
GB24 SII-Boilers with s/n beginning ACH
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