TOPSFLO Hot/Cold water circulation pump,Brushless DC Pump TL-C12H/PV 12V/24V DC;Max Flow Rate16-20LPM;Max Water Head8-11M;System pressure:4 Bar;Temperature:100 (212 TOPSFLO Unique Closed Impeller-dynamically balanced,higher efficiency,steady flow,ultra quiet Lifetime 20000 hrs, 24hrs work continously; Food grade,big flow and high water head Three-phase ECM brushless DC motor,high efficiency,low consumption,multifunctional control,start sma PWM function & Submersible can be customized,over-voltage protection,overload protection