What is the difference between the R10000-UNBX and R10000-UNWS? I'm planning to purchase the T17T055-RB shower control.
The Delta R10000-UNBX 1/2 Inch Rough-In is the same as the R10000-UNWS 1/2 Inch Rough-In, but the latter of the two has a service stop at the valve. This means that if you had a leak or if you were servicing another fixture in the bathroom, you could just turn off the bath/shower and still have the function of the sink and toilet or whatever other fixtures you have. With other valves, you would have to turn off the main water supply. If you need to shut off water to the valve, you just remove the handle and there is a flat-head screw to turn.