American Standard Madera 15-Inch EverClean Toilet System With Manual Piston Flush Valve, 1.1 gpf/4.2 Lpf - AMS-2855111

No tank. The Madera 2855111 is a floor mount flushometer bowl supplied as a system with a manual piston-operated flush valve, so it runs off a pressurized supply line rather than a gravity tank. It needs a supply capable of driving a flushometer, not a standard tank fill line.

Top spud. The bowl is an elongated floor mount flushometer bowl with a top spud inlet, so the flush valve connects down into the top of the bowl rather than behind it. If your rough-in was built for a back spud bowl, this is not a drop-in swap.

Rim height is 15 inches (381 mm). That is the standard-height Madera, not the taller 16-1/2 inch comfort-height bowl typically specified for accessible stalls, so for a barrier-free restroom you want the taller Madera instead.

1.1 gpf (4.2 Lpf), with a maximum 1,000 gram MaP score, which is the top of the MaP bulk-removal scale. That combination is why it gets specified in schools, stadiums and office buildings where the fixture has to meet low-flow water rules and still evacuate reliably.

The manual piston valve uses American Standard's DynaClean self-cleaning wiper spring. An integral wiper spring scrubs the refill orifice on every flush, which is the orifice that clogs and causes valve run-on. The handle is also non-hold-open, so it shuts off automatically even if someone holds it down. That matters in restrooms where run-on complaints and water waste are the recurring maintenance call.

Elongated, which is the bowl shape commercial and institutional specs normally call for. Order an elongated seat to match; a round-front seat will not fit the rim.

It is sold in white, under American Standard part number 2855111.02. That is the single configuration for this system, so for a facility standardizing restrooms across a portfolio, one part number covers bowl plus manual piston flush valve.

EverClean is a permanent glaze-level surface treatment that inhibits growth of stain and odor-causing bacteria, mold and mildew on the china itself. It does not sanitize the room or reduce cleaning frequency requirements, but it keeps the bowl surface from harboring the organisms that drive staining and odor between cleanings.

The Madera bowl has a built-in condensation channel to manage sweating on the china, which is a common problem in humid or cold-supply buildings where drips pool on the floor around the base. It is a design feature of the bowl, not an add-on insulated tank liner (there is no tank on a flushometer bowl).