Riobel Riu 1/2" Thermostatic & Pressure Balance Trim With Up To 5 Functions, Knurled HandlesRiobel Riu 1 2" Thermostatic & Pressure Balance Trim With Up To 5 Functions, Knurled Handles Thermostatic and pressure balance trim supporting up to three independent and two shared shower functions. Features Thermostatic temperature control with set and forget memory TRUTM47KN: Supports 3 independent functions with no shared positions TRUTM45KN: Supports 3 independent functions with 2 shared positions No separate shut off or diverter valve required