UPS15-55SUC Grundfos 3/25 HP Stainless Steel Circulator Pump (59896781)Features:Quick connect terminals for easy installationRemovable check valve eliminates the need for an in-line flow checkStainless steel your answer for corrosive and oxygen bearing fluidsPatented electronic starting unit provides the highest starting torque of any circulators in its classCeramic bearings ensures years of quiet, trouble-free operationInternal lip seal and filter keeps debris out of rotor canSU = 1-1/4" Union (GU 125)  SpecificationsFlow range: 0-25 U.S. gpmHead range: 0-18 feetMotors: 2-pole, single-phaseMax. liquid temperature: 230 °F (110 °C)Min. liquid temperature: 36 °F (2 °C)Max. system pressure: 145 psiFlange Model Pictured