Are these serviceable? Mine has a knurled end, does this unscrew? I'm pumping but nothings getting through.
...Hi Rob, ...Yes, you should be able to remove the pump assy, then if you look down the tube you will see a slot? ..That's the top of the non-return valve.... Get a screwdriver that fits well and it should unscrew... Once you've got it out it should come to bits... Sometimes they can stick shut, Hope this helps, pb
Thank you, I managed to get it apart and found the little spring had rusted through, I'll include a rebuild kit for it in my parts list.
