- APC-E4-2331Minipowerpack "UPW-RE with solenoid cartridge NC-24V - DC 24V Motor - 2000W with relèl switch and thermal protection - Pump 1P3, 1 - retain valve - Adjustable relief valve - Pressure Switch - Steel tank 23 lt. (Fixing brackets on the tank) - Horizontal installation "OR" - motor protection