Standard Power Pack "UPW-STD" with P-T ports 1/4"G - 12V DC Motor - 800W with contactor and thermal protection - Pump 0P0.50 (0.5 cc/rev) - Check valve - Adjustable maximum pressure relief valve - Pressure switch port 1/8"G - Maximum pressure relief valve to be set - Offset SQUARE plastic tank, 5 liters, neutral color - Horizontal mounting "OR".