Can I use one of the outlets to fill my tub?
Yes, one outlet can be used to fill a tub. An outlet icon on the controller can be changed to a tub spout if the app has be downloaded onto your phone and the controller is connected to the cloud/internet. This can be done in the "Settings" section of the app. Be aware that one outlet will produce a maximum of 6gpm / 23 lpm at 45psi unrestricted on any one outlet, so this specification will need to be evaluated with the size of the tub in question.