American Standard Yorkville VorMax Two-Piece 1.28 gpf/4.8 Lpf Chair Height Back Outlet Elongated EverClean Toilet - AMS-209AA137

The Yorkville VorMax is a floor mount, back outlet bowl, so it discharges horizontally into the wall rather than down through a floor flange. That makes it the right fit for slab-on-grade construction or a retrofit where the drain already runs through the wall behind the fixture. If the opening you are working on has a standard floor flange with a vertical rough-in, this is not the bowl to order.

The bowl sits at 16-1/2 inch (419 mm) chair height, which American Standard calls out for accessible applications. Add the seat thickness on top of that to get the finished seat height for your opening. Note the seat is not included, so the height you deliver depends on the seat you pair with it.

No seat. What ships is the combination bowl and tank plus a chrome trip lever. You will need to order an elongated seat separately, and for a commercial washroom that usually means an open-front seat without a cover. Bowl shape is elongated, so a round-front seat will not fit.

It is gravity flush, not pressure-assist, and American Standard rates it at 50 percent less noise than pressure-assist toilets. That matters in hotels, healthcare, and multi-family where a pressure-assist unit next to a guest room is a complaint generator. American Standard also notes it clears paper seat covers consistently, where pressure-assist units tend to rip them and leave paper behind, which is the usual reason facilities move away from pressure-assist in public restrooms.

It flushes at 1.28 gpf / 4.8 Lpf and is classified as a high efficiency toilet (HET). That is the flush volume specified on most water-conservation and green building schedules, and it is under the 1.6 gpf federal maximum.

American Standard classifies the Yorkville as a commercial fixture. The features line up with that: an EverClean antimicrobial glaze that inhibits stain and odor causing bacteria, mold and mildew on the surface, and a CleanCurve rim with no hidden rim channel where build-up collects. Both are aimed at reducing the labor a janitorial crew spends per fixture, which is what decides the spec in schools, healthcare, and hospitality.

White is the finish offered, and the American Standard part number for it is 209AA137.020. The 209AA137 base number identifies the Yorkville VorMax two-piece, chair height, back outlet, elongated bowl and tank combination; the .020 suffix is the white color code.

Only the back outlet openings. The 209AA137 is built as a back outlet bowl, so it will not adapt to a vertical floor rough-in. For a building with both conditions, spec this one where the waste exits the wall and pick a floor outlet Yorkville VorMax model for the rest. You keep the same bowl shape, the same 1.28 gpf flush volume, the same EverClean surface, and the same 16-1/2 inch chair height across both, so the seats and the maintenance routine stay identical.

No flushometer. This is a tank type gravity toilet, so it takes a standard supply stop and riser to the tank fill valve, not a flush valve off the main. The trip lever is chrome and comes in the box. If you are replacing a flushometer bowl on a back outlet rough-in, plan on the water supply moving from the flush valve height down to a stop below the tank.

VorMax replaces the holes under the rim with a single jet that scours the bowl, and American Standard rates it at twice the bowl cleaning of a conventional toilet. Paired with the CleanCurve rim, there is no rim channel for build-up to hide in, which is where most of the scrubbing time goes on a standard two-piece.