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    Heating system water hammer

    Getting water hammer when motorised 2 port Honeywell turns hot water off to the cylinder. Valve works fine and its the right way. System been in for years and its just started happing. Boiler pump keeps running which is correct to dissipate the heat but as soon as the hive turns the hot water...
    • Adam a
    • Thread
    • abv boiler cental heating heating heating and hot water honeywell 42005748-001 hot water cyclinder water hammer y system vented
    • Replies: 1
    • Forum: General Discussion
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