Our Cherubini Hunters are 34 to 43 years old. Nylon scuppers and through hull fittings become brittle with UV exposure and those corrugated plastic hoses get brittle with age even down in a dark bilge. These fitting and hoses, if original, are well past their life expectancy.
I've been thinking about replacing my deck scuppers soon. No leaks so far that I have noticed, but when one component goes, I'll replace the whole assembly; scupper, hose, and through-hull. In fact, I may as well just put it on the "to do list" now and deal with it pre-emptively.
Digressing slightly here..... I have already eliminated or replaced all the other nylon through-hulls on the boat. The nylon lavatory sink drain through hull fitting at the waterline was replaced with a bronze seacock, and a nylon bilge pump discharge through hull that I had decided to relocate because it was behind the electric panel (WTF?) was so brittle that it literally sheered off in my hand when I tried to pull the hose off. So if you have nylon through-hulls, especially at or near the waterline, best to get rid of them.