circulation pumper feature 1) no leakage,low noise 2)easy to operate 3)CE,UL,GS certification,etc circulation pumper feature a) SpecificationsModelMaterialsSpeedCurrent (A)Voltage (V)Power(W)Max.head(m) Max.flow(m3/h)Import and Export Drive(mm)Weight(kg) Volume(m3)GPD15-6SFCCast iron3speed0.9/0.7/0.5220100/70/555.7 30.004GPD25-10SFCCast iron3speed2.0/1.7/1.2220230/190/13510 4.50.004GPD25-12SFCast ...