American Standard Cadet PRO 1.28 gpf/4.8 Lpf 12-Inch Toilet Tank with Tank Cover Locking Device - AMS-4188A164

Tank only. The American Standard Cadet PRO 4188A164 is a vitreous china toilet tank with the tank cover and a tank cover locking device. There is no bowl, seat, or wax ring included, so you're pairing it to a Cadet PRO bowl you already have or are buying separately.

That's the rough-in, the distance from the finished wall to the center of the closet flange on the bowl it mates with. A 12-inch rough-in is the most common in North American residential construction. If your existing bowl sets to a 10-inch or 14-inch rough-in, this tank belongs to a different bowl configuration and you should match the tank to the bowl model, not to the wall measurement alone.

1.28 gallons per flush (4.8 liters), which is the HET rate. If the bowl it's going on was engineered for a 1.6 gpf tank, you can get carry problems in the trapway, so keep tank and bowl matched to the same Cadet PRO flush rating.

It keeps the china lid from being lifted off. That matters in multi-family units, schools, parks buildings, and any restroom the public reaches, where an unsecured lid gets stolen, dropped, or used to tamper with the flush valve. The lock is part of the 4188A164 tank, not an add-on kit.

American Standard classes the 4188A164 as a residential tank, so it suits apartments, condos, and single-family work. For a high-traffic commercial restroom, a unit built to commercial duty is the better call, though the locking lid does address the vandalism concern that usually drives that choice.

White only, ordered as 4188A164.020. The .020 suffix is American Standard's white finish code, so if you're matching an existing white Cadet PRO bowl the color is consistent across the family.