Moen T8389 Commercial Posi-Temp Pressure Balancing Tub/Shower 2.5 gpm, Chrome lever design for ease of use vandal resistant PosiTemp pressure-balancing valve maintains water pressure and controls temperature ADA compliant Moen Posi-Temp valve not included No. Valve 8370HD or 8371HD or 8372HD or 8373HD or 8374HD. sold separately required for operation