Lowara TLCN 25-6 Hot Water Circulation Pump Stainless Steel 105006127. The TLCN 25-6 is a stainless steel residential hot water secondary circulator pump. The TLCN’s motor is a manually set three speed wet motor. Single Phase: 1 x 230V. Port Size: R 1 1/2 inch. Fits pipe size: 25mm.