Has anyone changed out from manual to electric head? I just purchased a 28 ft O'day, purchased in the dead of winter. The previous owner stated the holding tank was flushed. Now that the warm weather is coming, well I'll let you guess. The boat will be launched on the first of June, with her first voyage to the pump out dock. Ihope after replacing the hoses, and flushing I will be able to use the v birth. Does the sanitary hose discharge make the bend necessary to make the hook up on the discharge of the head? Do you need a loop installed in the system? There is no loop now. I opened the vapor discharge hose and that let out back pressure because it was clogged. WHAT A WONDERFUL EXPERIENCE THAT WAS. Well if you can help I'd appreciate it. Ahead of time I know I was wrong to not check the tank..Buyer beware...I am an idiot...What were you thinking...You should have known...I have land you might be interrested in..there I think that just about sums up those responses. Thank You