No not yet, I want to be sure of it before I do, it could create more pump~heat if the pump cant 'slip' could'nt it?, the motor would be forced to do the work it would'nt normaly?...
There's definatly air forming with the noise, it gets to a stage where there's a trickling noise now!, if I turn the pump off then, and tap it one or two tiny(match head sized) bubbles rise into the tube
. air is'nt getting into the system anywhere, so it has to be cavitation forming it does'nt it?, but
why?!...