The island is on treated municipal water, so this is something we suggest selectively rather than as a matter of course.
Living by the sea does not affect your tap water
Worth saying plainly, because people reasonably assume it must. The supply here is municipal and treated, and salt in the air has nothing to do with what comes out of your taps.
What people actually notice
Chlorine taste is the usual complaint, and a filter at the kitchen tap deals with it for a fraction of the cost of a whole-house system. That is often all anyone genuinely needs.
Discoloured water is a different problem
If your water runs rusty first thing and clears after a minute, that is old galvanised pipe inside your own house rather than anything wrong with the supply. A filter hides it; replacing the pipe fixes it. We would rather explain the difference than sell you the wrong thing.
Where sediment filtration helps
In older homes with ageing pipework it protects taps and appliances from the debris coming off the inside of those pipes.