Hayward ASC-1P-A-LV Aqua Solar Control System with 1-1/2 to 2-Inch 3-Way Positive Seal Valve and 2 PC Sensors Aqua Solar control system with LV output Precise, easy-to-read, calibrated temperature setting Electronics in UV-protected locking weatherproof enclosure Comes with 1-1/2 to 2-inch 3-way positive seal valve and 2 PC sensors LED indicators show status of system operations