I am installing my own fire sprinklers in my remodel. I already have the riser in and passed inspection. My question is about the heads. I may have mounted some of them too high. I have enclosed a photo showing what I mean. After looking at the pics, can you tell me, based on the scale I have provided on the pic, at what point is the head recessed too far into the ceiling for the head to work correctly. It looks like if I keep the head with Point A even with or slightly lower than the ceiling, they will work fine. Hope I never have to find out. Thanks so much

Hey jack stop being so cheap and hire a professional to install them.. Do you really want to get it wrong?? I mean at least leave the heads to some one who knows, man! Im sorry but I'm a licensed sprinkler fitter and I'll tell you... as long as the deflector (or A is below the ceiling you should be fine) that apllies to all pendant heads.. cause that's what displaces the water and you don't want it to end up in your ceiling