... , no leakage, environment friendly 2, high quality and low price hot water circulation pump a) specification:ModelMaterialsSpeedCurrent (A)Voltage (V)Power (W)Max ... mixed-loop system.It also can be used to supply water and add pressure for mansions of city,villa of suburb ... cycle for cooling air-condition,boiler and solar energy,supply hot water and keep warm in cycle,etc.c) the ceritifications we ...