"The ideal choice for pressurizing water in a closed system. The digital controller adjusts water flow as the demand is increased and decreased while maintaining a very smooth flow. The unique variable flow feature allows the pump to be mounted without an accumulator tank and still maintain an even flow regardless if one or multiple taps are being used. Connections: 3/8"NPT/ hose 1/2", 1/2" NPT / hose 3/4", 1/2" NPT /hose 3/4" 1/2" CTS."