American Standard Afwall Millennium 1.1 – 1.6 gpf (4.2 – 6.0 Lpf) Back Spud Elongated Wall-Hung Bowl - AMS-2634101

The Afwall Millennium 2634101 ships as the china bowl only, less seat. It's a flushometer bowl, so there's no tank and no trip lever included either. To finish the job you're ordering three more things: an elongated open-front seat, a flushometer sized for the 1.1 to 1.6 gpf range the bowl is rated for, and a carrier or wall-mount system to hang it. The bowl takes a 1-1/2 inch inlet spud, which is what the flushometer's vacuum breaker tube has to match.

Back spud. The inlet is on the rear of the bowl at 1-1/2 inches (38 mm), so it pairs with a back-spud flushometer where the supply and vacuum breaker drop behind the fixture rather than over the top of it. A top spud valve will not land on this bowl. If the existing valve in the stall is a top spud unit, you are changing the valve as well as the bowl.

It's a High Efficiency Toilet rated to operate anywhere from 1.1 gpf to 1.6 gpf (4.2 to 6.0 Lpf), so a 1.28 gpf flushometer falls inside its range and works. That range is useful on retrofits: if a building is standardized on 1.6 gpf valves, the same bowl runs on those without a change, and you can drop to 1.1 or 1.28 later just by swapping the valve.

The Afwall Millennium carries a MaP score of 1,000 grams across its whole 1.1 to 1.6 gpf range, which is the top of the MaP scale and the number specifiers use for high-use commercial restrooms. It flushes with a direct-fed siphon jet action through a 2-1/8 inch (54 mm) fully glazed trapway with a 2 inch (51 mm) minimum ballpass. The glazed trapway is the part that matters day to day, it's the surface waste has to pass rather than a rough china bore.

If what's there now is an elongated back-spud wall-hung flushometer bowl on a working carrier, the swap is a bowl change: the carrier stays, and the existing back-spud valve reconnects to the 1-1/2 inch inlet spud. Where it stops being a simple swap is a top-spud bowl, a round-front bowl on a shallower stall, or a valve fixed at a flush volume outside 1.1 to 1.6 gpf. Confirm the spud location on the old bowl before ordering, that's the detail that decides whether this is an hour or a day.

A wall-hung bowl like the Afwall Millennium leaves the floor clear underneath, which is why it gets specified in schools, airports, healthcare and anywhere the floor gets mopped or hosed. The trade-off is behind the wall: it needs a carrier in the chase and a back-spud flushometer, so it suits new construction or a wall with existing carrier prep. If there is no chase depth and the drain comes up through the slab, a floor-mounted flushometer bowl is the right call instead. Note this one is elongated, so it needs the deeper stall clearance an elongated bowl requires.

The bowl uses a concealed trapway design with a condensation channel built in. Concealed trapway means the outside of the china is smooth with no trap bulge to collect dust, which is the reason it gets picked for restrooms cleaned on a schedule. The condensation channel handles sweating on cold supply lines in humid buildings, a common complaint on commercial china where drips get mistaken for a leaking fixture.

Vitreous china with a conventional glaze, offered in white only. The part number to order is 2634101.02, the .02 suffix being American Standard's white. If a facility is matching existing fixtures, white is the standard commercial finish and this bowl will match other American Standard white china.