Overview Product Description S46, order number 174037-113, Three Piece Hot Water Circulator pump, 1/3 h.p. 115 volts single phase built in thermal overload, fitting in place of Bell & Gosset series HD3. These custom circulators feature the classic horizontal in-line design, engineered for durability and smooth operation. Designed for large flow applications. Impellers and motors are fine-tuned to meet the exact system requirements. Product Videos Custom Field Product Reviews