s-trap or p-trap for tub??

Hi folks,

I'm ready to install my whirlpool in my new basement bathroom. Ive cut into the slab and have plenty or space to work with but which trap works best? A p-trap or an s-trap? This tub will also be used as a shower also if that makes any difference.

Thanks all

Martin

 

P-trap. S-traps aren't to code. A tub gets a 1.5" drain, a dedicated shower would need a 2". Don't forget the vent line.