2 WARNINGS: your thru hull drain must have a 3/4" downward slope to it or the scupper will hold water in when you wash the cockpit. Second if you drop the gasket in the water once it is a foot down you can not see it. In 3' of water I tied a string to the other gasket and dropped it in, all I could see was the knot in the string! I ordered a second one.

2 WARNINGS:

your thru hull drain must have a 3/4" downward slope to it or the scupper will hold water in when you wash the cockpit. Second if you drop the gasket in the water once it is a foot down you can not see it. In 3' of water I tied a string to the other gasket and dropped it in, all I could see was the knot in the string! I ordered a second one.