Pex when you pull up on the diverter the entire spout moves.
Why no pex for tub spout drop.
Valve to tub spout tube is.
Any restrictions cause the water to gently back up as it waits its turn to exit the tub spout.
You need an unrestricted flow out through the tub spout.
There is no way to secure pex adequately to keep a tub spout from flopping around.
Shark bite copper shark bite 90 iron pipe pex everywhere else.
If the valve has a built in diverter three handle valve this would not be an issue.
Valve drop to spout tube is within the 6 11 inch tolerance.
Eventually the line reaches the shower head and one gallon of water will exit there for every 4 or 5 that comes out the tub spout.
There is no stacking issue with the.
With a built in diverter you could use a pex drop eared ninety degree female adapter and a nipple but that is more trouble than it is worth.
So it s fine to have 1 2 pex going to the shower head.
2nd reason pex is flexible and the spout relies on the pipe for support.
Long story short it is unacceptable.
Copper keeps the spout in place.
The tub spout can be copper brass or galvanized pipe.