Cut The Hole
We have a 1979 edition of the Catalina 30. In the fiberglass liner, between the foot pump to the left and the rear access door to the engine on the right, happens to be where our sink drain thru-hull seacock is. Maybe yours is too. Point is, we couldn't easily get to it ever and apparently every owner before couldn't either. It was a frozen-open gate valve. When dry-docked a couple of years ago, we replaced the gate valve with a real seacock, but also cut an access hole in the liner to always be able to get to it. Its height matches the rear engine access hole, but its width is sufficently to the left of the engine hole to allow about 5" of liner to remain and maintain some support strength. We "widened" the engine rear access teak door to cover both holes and now have easy access to the seacock, engine AND service to the foot pump.S/V Dixie