What type of shower arm will be needed?A.
The Moen S6320 will work with any shower arm that has a 1/2" connection.
Does the Moen S6320 require a rough-in valve?A. The Moen S6320 is a rain shower head. There is no rough-in or valve required for the head itself. The valve would be associated with the trim used to turn the water on and off. This shower head can work with any trim.
Does the threaded 1/2" connection require a gasket?A.
The Moen S6320 does not require a gasket.
Does this shower head come with a shower arm?A.
This is just the shower head by itself.
Does this shower head come with on and off handle?A.
No, the Moen 56320 does not come with an on/off handle.
Could I mount this from the ceiling? If so what extension arm do I need?A.
You can mount the Moen S6320 from the ceiling using a ceiling mounted shower arm. Moen does not make them but most of the other manufacturers do. Delta RP61058 would be compatible.
Does the shower-head pivot or angle at all?A.
Yes, the Moen S6320 does swivel.