Kohler K-528-K-NA DTV Digital Two-Port Thermostatic Valve, Not Applicable Digital thermostatic valve technology allows user to set precise and safe temperature control in both bathing and showering areas Delivers up to 13 gallons flow rate (at 45psi) with a maximum flow of 80 gpm from one outlet Connect up to two DTV Prompt interfaces (Requires K-527 or K-527-E DTV sold separately) from one valve and control Install valve up to 20 feet away from the interface (cable supplied with interface) Distance can be extended with a standard RJ-11 phone extension cord 1/2-inch hot/cold supply inlets.1/2 inch copper tube connections