Ok, now I've got your attention, yet another stupid question.
I have one of those autobailer jobs with the golf-ball valve. Fairly crap but worked reasonable when the boat was moored in deep water.
I have now moved and the boat is on a drying out pontoon. Last year this led to the valve becoming clogged and the boat flooding with water overnight. Spent the rest of a very short season with a rubber glove stuffed with a rag wedged in the hole.
The boat is now antifouled, serviced and ready to go back on the pontoon. Do I
1. Buy an elephant trunk. If so can I easily fit it over the existing fitting
2. Buy a bung. If so what and where from? The hole is about 70mm.
In the meantime, where's that glove?