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No idea - thats not helpful is it!  maybe it doesn't have enough power to pump the water the distance you need or the pump is not working properly, if you wired the pump the same as the old one I can't think of a reason as to why the pump is still running when you turn the tap off, if that didn't happen before. 

Thanks for responding so fast!

We've just tried the previous, leaky, pump and the tap turns it on and off okay so can't be the tap switch?? The "new" pump is quite a bit smaller than the old one so may not be powerful enough. Previous pump is a Fiamma SF Superflow Pro 126 new one an Aquaflow.

Off to conduct trials with a bucket!

Sounds like an airlock,try running the pump and sucking the end of the tap with a short piece of hose while the tap is turned on,this worked for me.

I am no expert,  I would say its an air lock.....as each time I fill my water tank I have to release some air from the pipes before the water will come through although the pump is okay,  there should be a connection of the pipes from you tank, where  your can open to release the air, as that the only way mine will work..... hope this is some help and good luck.

Think the problem is that the new pump requires to be gravity fed, i.e. it can't "suck up" the water from the tank. Old pump sucks water up from a washing up bowl below the height of the pump and spits it out very happily. (Excuse the technical terms!)

Any recommendations for a good place to buy a water pump, internet or near Nottingham?

Celia

its possible that the pump may have stuvk rotor vanes try giving it atap on the side with the handle of a screwdriver see if it changes pitch in the water  ie hold it out of the water then drop it in whilst its running if the pump changes pitch its pumping but if it doesnt then its fubed

I left a message with my email on it as i wanted to speak with you, if possible and ask if you are going to Halloween this year as it will be quite like a reunion for us all.

Joan.               

Glad it work out okay for you