When Catalina installed these sinks in your boat, two modifications were required to make the drain fit:

• The stainless drain flange had to be machined smaller to fit into the recess of the oval sink.
• The hole in the center of the sink was enlarged a bit to accept the diameter of the drain assembly.

This part is specially machined so the flange has a smaller outside diameter for the oval sink.

This assembly uses Forespar's straight hose nipple to connect the bottom of the stainless steel drain to the hose.

• Flange diameter: 2-1/4"
• Thread diameter (where it passes through the sink: 1-13/16"
• Hose barb: For 3/4" hose