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Chris , i understand how water must enter the boiler using the t piece to fill it , i have filled it many times wgen i have removed radiators to decorate , what my point is , is that i am removing at least 10 pints every 10 days and the water pressure on the guage returns to 1 bar and the...

sorry oilman...its a worcester 28cdi....been looking through the threads and i think it could be the expansion tank by the sounds of it...but steveyboy has the same prob and replaced his to no effect so im like 60-40...i know the presure relief valve kicks in at 3 bar so i always bleed at 2 and...

Im having the same problem mate , gradually but only when the heating is on the bar pressure on the guage goes up by a tenth of a bar a day untill after 10 days or so its on 2 bar when not heating and 2 and a half when working...no other problems... I have to bled the radiators and was also...