backman
Captain
My in deck fish box/live well has a macerator drain at the bottom and a surge tube which leaves to a 1.5" transom PVC throughhull a couple of inches above the waterline. At drift water will surge into and fill the fishbox.
The fishbox outflow has the attached fitting. What is it and where do I find the piece that screws into it and seals it when I am using the space as a fish box/storage space?

The fishbox outflow has the attached fitting. What is it and where do I find the piece that screws into it and seals it when I am using the space as a fish box/storage space?
