recharging expasion vessel

Joined
26 Sep 2007
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Location
Yorkshire
Country
United Kingdom
Can someone advise me on recharging expansion vessels. I know you check the pressure cold and recharge it to its working pressure cold, but is it simply done by a bike tyre pump?
 
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ya need a open end in the heating circuit such as a drain off or prv, pump the ex-vessel up to about 1bar and thats it! but if it needs re-chargin ya mite hav2 replace the prv as they dont always re-seal themselves once theyve been operated!
 
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