Thank you for your question, Yinn! Installation factors such as the PSI to the home can impact the maximum flow rate and the diverter rough-in will slightly reduce the flow rate as well. The 17T series will, however does provide the highest Gallons Per Minute possible at approximately 10.9 gpm, 41.3L per min at 80 PSI when using a High Flow rough-in such as the R10000-UNBXHF. This Rough-in, although it has a blocked tub spout port, includes screwdriver stops which will also reduce flow slightly. Either rough-in valve should be able to support these products but if you have a lower PSI in the home, we would recommend a High-Flow valve instead.
Best regards, Edward
Date published: 2019-05-25