I have an old fiberglass pool that had the main drain sealed up from a previous owner for what reason I don't know. The pool is currently drained for repainting and upon cleaning noticed that the cover for the drain seems to be homemade. Before painting i want to seal the hole again with a new setup but not sure how to go about that. Can i fill the hole with something? Is there a cover designed for this? The body of the drain is still in there and in decent condition. On the plastic pieces i see 2 part numbers 1058c and SP-1053-B




