Thanks Chris I’ll order one.Dont think customer would have paid for complete pump.Never done one of these before but for the record disconnect everything,cabinet off(screws all round),turn upside down and take screws out of back and base and then you can get at the circ pump screws.Probably telling grandma how to suck eggs but there you go.
Just been out to one of them in the world’s smallest kitchen, no room to do anything! I just about was able to take to cabinet off. So couldn’t really see how to get to circ pump, so thanks to the OP for his telling grandma how to suck eggs tip. Very useful.