Sea intakes and valves, if they break while underway, are likely to do really big damage. If you need to make an emergency repair at sea, instead of relying on the old system of a cork in the pipe to prevent water from entering while you work on the socket (a method that is not quick and very inconvenient when the cork then has to be removed), you might opt for the more practical Seabung.
It is a “Made in England” flexible rubber rod to be threaded into pipes that has an “umbrella” at its end that seals the socket and prevents water from entering while you repair the leak. Now it is finally available in Italy, it costs 61 euros (VAT included) and you can buy it directly HERE.
LOOK AT HOW TO USE SEABUNG