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4. Repressurise boiler to 1 bar via filling loop to remove the condense water (around 0.5Ltr) from the vessel *
5. When condense has stopped flowing, drain boiler via a drain point. Leave drain point open and remove tube.
6. Fit new Schrader core and recharge the restored vessel as per the manufacturer’s instructions and above guidance
(normally 0.5 bar for most installations).
7. Close the drain point and re-attach the Schrader valve cap. This cap has an additional O-ring inside to provide a
double seal effect. Ensure this cap is as tight as possible to give the expansion vessel extra protection from
Schrader core leaks.
8. Set the system pressure and allow boiler to go through its air purge function for 7 minutes.
** If water continues to flow out through Schrader valve after the condense has been removed, the membrane is
split, and vessel requires replacement**.
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