ProPEX / Uponor question on tub spout

[jasontf]

I have read in several locations that you cannot connect a tub spout with a diverter to PEX. The explanation that is usually given is that the inside diameter of PEX+fittings is smaller than copper and it will result in water going up and leaking out of the shower head when the diverter is set to the tub spout.
However, I am planning to use valve that includes a setting to switch between the showerhead and the tub spout at the control unit, so my tub spout will not have a diverter. If this is the case, then should I still run copper to the tub spout or would PEX (using the 1/2" drop ear elbow) be OK?

 

[wwhitney]

The prohibition on 1/2" PEX to the tub spout only applies when the diverter is on the tub spout, (via twin ell or similar mechanism internal to the shower valve). If you have a diverter control on the shower valve, then the restriction imposed by 1/2" PEX to the tub spout would not cause a diverter issue.

Cheers, Wayne

 

[Sponsor]

 

[Terry]

A valve with it's own diverter solves the PEX to spout issue, except that it will reduce flow to the tub spout anyway. It just depends on how fast you want your tub to fill in that case.