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Hi i have this valve plumbed into a double grundfos pumpplan - there is a red plastic screw on top - does anyone know whether this should be partly open or fully closed - Its fully closed now - i do have air in the system on occasion and have had to bleed the pumps - I have searched google and...

Hi I have an Old (1992/3) ALPHA range / boiler - its has two ecoflam minor 1 Boilers - I had fuel oil delivered the other day and the next day it locked out. I reset it and after about 1-2 hours it locked out again. The boiler goes through its cycle and heats the water and every so often when...