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gas fired boiler

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gwh
gwh Member Posts: 1
in Domestic Hot Water
Why does the expansion tank require an isolation valve between it and the boiler?

Why does the water intake pipe need isolation valves on both sides of the back flow valve?

Both examples required for easy removal/replacement?  Safety?

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  • lchmb
    lchmb Member Posts: 2,997
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    service

    When you have an issue it is much easier to replace them this way...
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