dri an down heating push flue back to wall remove 4 screws on bracket on top back of boiler remove front cover then undo nut on bottom of expansion vesal then it will pull out the top Replace in revers order refill boiler and test
paul
January 2011
depends on the boiler and how much room around the boiler if the vessel isn't leaking much easier and cheaper to fit an off the shelf vessel into the system
brian
January 2011
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