American Standard Colony 1.6 gpf/6.0 Lpf 10-Inch Rough Tank - AMS-4192B004

That's exactly what this tank is built for. The Colony 4192B004 is a 10 inch (254 mm) rough-in tank, so it suits older bathrooms where the closet flange sits 10 inches from the finished wall rather than the usual 12. Measure from the finished wall surface (not the baseboard) to the center of the closet bolts before you order. If that measurement comes back at 12 inches, this is the wrong tank.

Tank only. The 4192B004 is the Colony rough tank, supplied with a color matched trip lever and color matched bowl caps, but you still need the matching Colony 10 inch rough-in bowl, a wax ring, and closet bolts to finish the job. The tank carries a 2 inch flush valve, so the bowl it sits on has to be the mating Colony model.

The Colony 4192B004 is specified with a 16-1/2 inch rim height for accessible applications, which is the dimension that matters when you're outfitting a unit or restroom to an accessible layout. That rim height is a property of the bowl and tank combination, so pair it with the matching Colony bowl to hold it.

1.6 gallons per flush (6.0 litres), the standard federal maximum for a residential toilet. It uses a PowerWash rim that directs water around the bowl on each flush, and a 9 x 8 inch water surface area, which is what keeps a 1.6 gpf bowl clean rather than needing a second flush. For a property manager swapping out older 3.5 gpf fixtures across a building, that's the water saving per flush.

Three colors: White (4192B004.020), Bone (4192B004.021), and Linen (4192B004.222). The trip lever and the bowl caps come color matched to the tank, so you're not left with a white lever on a bone tank. If you're matching an existing American Standard fixture, order by the suffix, .020 for White, .021 for Bone, .222 for Linen, since the color name alone varies across brands.

American Standard classes the Colony 4192B004 as a residential fixture. It's a common choice in apartments, condos and single-family rentals, and property managers standardize on it because the Colony line is widely stocked and the parts stay available. For a high-traffic public restroom, a commercial flushometer bowl is the better call than a residential gravity tank.