Delta Shower Systems are one of our best selling products but we know they can be a little tricky to set-up. There are many components that are required to build a Custom Shower System. We have included all the necessary Rough-in Valves and component pieces to make this package fully ready to install. Order this item and get everything required to have your Delta Shower System up and running. Make things easy! Don’t spend hours hunting down each little piece separately. Delta Shower System Package Includes All Required in wall Rough-in Valves.This package is specifically designed to ensure adequate water pressure for all Shower System Sprays. This Dual Handle Shower Control Features a Delta’s highest flow rate Thermostatic 17T Cartridge with an 8.53 GPM flow rate at 80 PSI. This Delta Shower System has been expertly optimized for this water output and will have good water pressure even at 60 PSI.