There is a storefront that needs a suspended ceiling and needs to turn the fire sprinkler head up an

No. If it's a normal type sprinkler, it doesn't matter if you twist it down, while a normal type of head only has one splash tray, so it's the same up and down. If it is a self-standing type, you can just change it to a drooping type, and you don't need to report it to the fire department.

This depends on whether the fire sprinkler system is dry or wet, generally speaking, the southern region generally uses the wet type, this kind of water pipe has water in it, so the water has to be stopped, if it is dry, there is no water in the water pipe. The water should be turned off near the alarm valve group, because this water is coming down from the balcony tank and then pressed upstairs through the pipe.

If it is a normal type of sprinkler, it does not matter if it is twisted down, but if it is a self-standing type sprinkler, it cannot be twisted down like this, because the splash tray of the self-standing sprinkler and the drooping sprinkler is different, while the ordinary type of splash head has only one splash tray, so it is the same upwards and downwards. If it is a self-standing type, you can just change it to a drooping type, and you don't need to report it to the fire department.

Also, I'll send you a picture to show you.

This depends on the size and nature of your store, and you can consult the fire department.