I am redoing my shower and taking the opportunity to put new shower head and body sprays in. I have a few questions about Delta fixtures. I have the Delta Carlisle In2ition w/ integrated showerhead and hand held shower. It has the Multi Choice rough in valve. I want to add the Delta single handle 6 Function Jetted module (T18037-XO) plus 2 body sprays. The valve recommended for the module is R1827-XO. Is anyone failiar with Delta to let me know if this valve is a mixing valve or just a diverter? I cannot seem to get an answer from the website I plan to order from and noone locally seems to know much about this. I would like to operate the jetted module and sprays seperately from the showerhead and tub spout. To do that, I think I need a seperate mixing valve for the module, right? I just want to get the plumbing right before I cover it all up. Thanks for any help you can provide.