American Standard Transitional Slow-Close & Easy Lift-Off Elongated Toilet Seat - AMS-5024A65G

It's built for conventional elongated bowls, and American Standard states it fits most of them. Elongated is the longer, oval bowl shape, not the round-front one, so measure your bowl from the seat bolt holes to the front rim before ordering: roughly 18-1/2 inches is elongated, roughly 16-1/2 inches is round front. If your bowl is round front, this seat will overhang and won't sit correctly.

Yes, it mounts from the top of the bowl. That matters in a tight powder room or a multi-family bathroom where the tank and the wall leave no room to reach underneath and hold a nut. One person, from above, no second set of hands under the china.

The seat is molded polypropylene with American Standard's EverClean surface, which inhibits the growth of stain- and odor-causing bacteria, mold and mildew. Polypropylene wipes clean and takes a standard bathroom cleaner without hazing the way some painted wood seats do. American Standard positions this one as a residential seat, so for high-traffic commercial restrooms a commercial-grade open-front seat is the better spec.

That's exactly what it's for. The seat releases from the mounting posts so you can lift the whole ring and cover away, clean the china around the bolt area, and drop it back on without tools. Combined with the slow-close hinge, which lowers the lid instead of letting it slam, it's the seat a property manager puts on units to cut both cleaning complaints and cracked-lid replacements.

The seat ships as a complete assembly with its own top-mount hinge hardware, so you don't reuse the old bolts. Pull the existing seat, clear the two bolt holes in the china, and set the new posts. Standard toilet bolt hole spacing is 5-1/2 inches on center, which is what this seat is built to.

A regular seat drops under its own weight, which is where cracked lids, chipped china, and 2 a.m. noise complaints come from. The slow-close hinge on the Transitional 5024A65G damps the lid and ring so they lower on their own once you start them down. For a landlord that is fewer replacement calls; for a homeowner it's the noise. The tradeoff is that slow-close hinges have moving parts a plain seat doesn't, which is part of why the lift-off release is there.