Tub drain primer (not laundry)
I'm having my basement slab jackhammered up and a new one poured, and they will be roughing in plumbing for a full bathroom (tub, toilet, sink), and a laundry drain.
I've been able to find lots of information on a primer for the floor drain primer, and will have them run a 1/2" line to the floor drain for that purpose.
However, I'm having a hard time finding information on a drain primer for the tub p-drain.
My expectation is that the contractor will give me a 12" x 12" box where the tub trap will reside.
Since the tub trap won't be poured permanently in place, should I run a 1/2" pvc line for it, then transition to a flexible plastic line?
Any advice would be appreciated, plus any sources for plastic p-traps with primer nipples.