I have a Delta one handle shower diverter (fit series 600)that I've replaced all parts but no water gets through to the shower head but it does come through when the diverter is not hooked up. I have tried using a compressor and blowing into each of the 3 holes (hot,cold and shower head) and assembled the diverter, but still no water. :confused:Do I have to replace the pipe to the shower head? Is there a way of doing this without tearing out the shower wall? I can't go in from behind because the water heater is up against the wall.

Unscrew the shower head and try the shower now.. Water coming out now? If so then pry out the rubber "water saver" washer with the holes around the edge and toss it. Reassemble and test. OK now? Regards, Tom