Loss of water pressure after 'T'ing' supply lines
My master bath's in the midst of a remodel. A second shower system (dedicated valves for each of 2 showers in the shower enclosure) is being installed. To get H/C water supplies to the second shower valve, existing supplies from the sink in the bathroom on the other side of the wall were spliced into using T's, elbows, etc. Right now, the new shower's at rough-in stage, so I'm guessing the new piping going to the new shower valve and shower head nipple are full of air.
The problem is, the water pressure for the sink in the other bathroom is down by more than 1/2 of what it used to be - just above a trickle. Is this because of the trapped air in the new pipes that can't be released yet, and will therefore be self-correcting after the shower is actually in use, or is this something I should be really worrying about?
Apologies in advance if my terminology fort he various parts is really wrong!