Ara. TempAssure 17T Series Valve Only Trim features a complete suite of coordinating products: Accessories, Faucets and showers. Delta.'s separate rough and trim program allows you to switch your trim without the hassle of changing your rough-in as well. Another great benefit is the ability to have your plumber install the rough-in before you've decided on the trim you want. By installing the rough-in first, you can later decide what type of trim will go perfectly in your bath.