Online installation diagrams for double sinks are available on KrausUSA.com and Blanco-Germany.com. Lowes.com also offers a photographic instructional guide for the installation of a dual sink as of 2015.
Kraus offers an instructional PDF on how to install a 33-inch topmount double sink. This PDF includes an eight-step diagram for installing the sink, as well as some information about the use and maintenance of the sink after it has been installed. Installing this sink requires a cutting tool, a drill and silicone sealant.
Blanco offers several different PDF instruction manuals, each of which focuses on a different method of sink installation. These manuals include undermount installation, drop-in installation and stainless steel apron-front installation. Each installation style is compatible with certain styles of dual sink. Users may click on the PDF link next to each installation style description to view the PDF.
Lowe's kitchen sink installation guide includes step-by-step photographic instructions for setting up a sink. These instructions apply to both single and dual sinks. The directions start by telling the user how to remove the existing sink, if applicable, by turning off and disconnecting the water lines. A garbage disposal unit should also be removed prior to installing a new sink. These instructions are for a drop-in style of installation.