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Just drained down my traditional vented system (with header tank) and changed a couple of rads plus took another off the wall to refix it (plasterboard walls ). At the same time I fitted a new grundfos pump and a sentinel filter. So the pump was an easy straight swop keeping the direction of flow the same pointing towards the floor (i.e. Down). The filter is added new and its flow direction is up (towards the ceiling)
From the pictures is this correct? Not all the roads are getting hot, I've bled the system lots and it was all working fine before I started everything.