GOULDS PUMPS
GOULDS PUMPS 3 Commercial Water. 3656/3756 M LGroup Numbering System Sistema de numeración del Grupo M y L, modelos 3656/3756 The various versions of the 3656 and 3756 M LGroup are identified by a product code number on the pump label. This number is also the catalog number for the pump. The meaning of each digit in the product code num ber is shown below. Not all .