Island bathrooms range from original vintage to full renovation, and their toilets narrate their needs the same across the spectrum. The phantom flush, a tank quietly refilling in an empty room, is a flapper passing water it shouldn't, a small leak with a persistent bill. The endless run is a fill valve retiring. The rock at the base is mounting gone loose, with the wax seal below next in succession, and on the island, where a failed seal can mean water working into vintage floors or, in a shared building, toward the unit below, the succession deserves interrupting early.
Repair carries most of the load, honestly. Tank internals swap piece by piece, and sound porcelain serves for decades on modest upkeep. Replacement enters at the cracks, at repair fatigue on a unit that's done, or at Coronado's frequent case, the deliberate upgrade during a renovation, where modern units deliver stronger flushes on less water and bidet installations, now completely routine, join the plan naturally. The read on which path fits comes from the fixture's actual condition, delivered plainly, decided by you.
The distinction that keeps things clear, a toilet that backs up is usually forwarding a message from the drain line, and drains are their own service with their own page. Running, rocking, leaking, sealing, replacing, that's the toilet's own work and it's performed by or under a licensed contractor. Set level, sealed properly, finished neatly. Plain English throughout, your decision always. That's the service.