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Discuss Drain down a Worcester Hi-Flow 550cdi boiler in the Central Heating Forum area at PlumbersForums.net

J

John Holt

Hi,
I have the boiler as above which has been very good for the last 13 years or more and is still relatively going strong.
However, now, the secondary heat exchanger is kettling and the easiest option is to replace it.
Although Worcester Bosch do sell a cleaning kit, whatever route I take, I'll still need to drain down the heat store.
There's plenty of advice on how to drain the central heating system available online but no instructions on how to drain just the DHW and heat store.
Maybe draining the central heating system also drains the thermal store - I don't know.
So, any advice/tips etc welcome.
Thanks in advance.
 
The thermal store has an isolation valve at the bottom of it, where you connect the filling loop, can you not just drain through that?
 

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