Got to my first job this morning, opened the back doors and could hear that my Shurflow pump had started without me
Must be an air lock I thought so went through the usual process of disconnecting hoses etc. Couldn't get it to pump any water. Sod it! Drove back home and fitted a spare pump and away it went.
I have taken the top off the duff pump but to my untrained eye can see nothing wrong with it. The diaphrams look fine. Mind you I can't work out how they move ayway any ideas?