American Standard Colony Two-Piece 1.6 gpf/6.0 Lpf Chair Height Elongated 10-Inch Rough Toilet Less Seat - AMS-221AB004

Yes, the Colony 221AB004 is built specifically for a 10-inch rough-in, meaning the closet flange centerline sits 10 inches from the finished back wall. That is the older rough-in you find in a lot of pre-war and mid-century construction, and it is why this model exists as a separate part number. Measure from the finished wall (not the baseboard) to the center of the closet bolts before you order. If that measurement comes out at 12 inches, this bowl will leave a gap at the wall and you want the standard 12-inch rough version instead.

The Colony 221AB004 is ADA compliant and meets Americans with Disabilities Act requirements for use and accessibility. It is chair height, measuring 17 inches tall including the seat, which is what puts it in the accessible range instead of standard height. One thing to watch on a spec job: it ships less seat, and the finished height varies slightly with whichever seat you pair to it, so pick a seat that keeps you inside the height you are being held to. Note also that American Standard classifies the Colony family as residential, so on a hard commercial spec confirm the drawing is not calling for a flushometer or a commercial-grade bowl.

No seat is included. The 221AB004 is a less-seat model, so you order an elongated seat separately. It does include the color-matched bowl caps and the trip lever, so the trim you would otherwise have to source is already in the carton. Because the stated 17-inch chair height is measured including a seat, the seat you choose has a small effect on the final height.

Yes, that is exactly the situation the Colony 221AB004 is built for. A 10-inch rough-in bowl sets over the existing flange, so you avoid breaking the floor and relocating the closet bend, which on a slab or a tiled bathroom is the expensive part of the job. Confirm the 10 inches is measured from the finished wall to the center of the flange, not from the baseboard, then it is a straight swap on a new wax ring. You will also be moving from whatever the old bowl used to 1.6 gallons per flush.

Elongated. The Colony 221AB004 has an elongated bowl, so a round front seat will not cover it correctly. Buy an elongated seat, and if you are outfitting units where tenants swap seats, standardizing on elongated across the building saves you the callback.

1.6 gallons per flush, 6.0 litres per flush, which is the federal maximum for a standard flush toilet rather than a high efficiency 1.28 gpf model. If your jurisdiction or a green building program requires HET or WaterSense at 1.28 gpf or less, this bowl will not satisfy that requirement and you need a 1.28 gpf model. For straight like-for-like replacement in an existing building, 1.6 gpf is the common number you are replacing.

Two-piece. The Colony 221AB004 comes as a separate tank and bowl that you bolt together on site with the supplied tank-to-bowl hardware. For property managers that is usually the easier call: the pieces are lighter to carry up a stairwell than a one-piece, and if the tank ever cracks you replace the tank instead of the whole fixture. You will still need a wax ring or waxless seal, closet bolts, and a supply line, which are not part of the fixture.

The Colony 221AB004 is chair height at 17 inches to the top of the seat, which is roughly the height of a dining chair and several inches taller than a traditional standard height bowl. Chair height is easier to sit down on and stand up from, which is why it is the one specified for accessible units, senior housing, and any unit where you want to avoid a future retrofit. Standard height still reads fine in a kid-heavy or purely residential unit. If the accessible requirement is on the drawing, chair height is what satisfies it.

Two: White (221AB004.020) and Linen (221AB004.222). If you are matching existing fixtures in a multi-unit property, White is the safe default and Linen is the softer off-white; the bowl caps and trip lever ship color matched to whichever you pick, so the trim will not read as a mismatch. Order the seat in the same color from the same brand family so the shade lines up.

Vitreous china, the glazed ceramic used on essentially all residential fixtures. The glaze is non-porous, so it cleans with ordinary bathroom chemicals and does not stain the way a porous surface would, and the PowerWash rim directs water around the bowl on each flush to keep the wash surface clean. For turnover work in rentals that is the practical benefit: less scrubbing between tenants.