I always keep one spare for grundfos pumps. I did send one to a forum member with the same problem once[/QUOTe
Can they be purchased new.....without needing to hunt through a tat yard?
Ok let me know. I renewed a vaillant EcoTEC pro 28 pump the other day which is made by Grundfos, assuming they are same size and thread, you can have the bleed screw from that if you get no joy?