[49merc]

As of today my problem is the flush head is plugged. See my last post to this thread.
About a year ago my flush unit would not work. Water was not getting through. I assumed it was the anti syphon unit but given where it is located I didn't really want to get into it. Well a couple days ago I decided to replace it until I saw how much a new one is so I thought I would see if I could figure out why it wasn't working. After making a larger hole in a wall behind the shower I could see the water was coming in but not out. Closer examination showed there was some rusty particles of metal behind the plunger and spring possibly blocking flow out. Pulled it out and got it all cleaned out but still didn't work. After trying several things it finally dawned on me nothing was getting through (tried blowing air) the pipe to the flusher and tank. So my question is does anyone have any ideas on this short of pulling the tank and replacing the flusher head?