Manufacturer: American Standard
Tank P/N: 4021
1.28GPF
Rough-In: 12″
Bolt Spacing: 6.375″ center to center
Tank Only, does not include lid or internal parts.
Internal parts and Lid 735121 Can be purchased separately
RELIANT Model
*Please note there are 2 different versions of the 4021 tank, one is 1.28gpf and one is 1.6gpf. The porcelain for these tanks are identical with the same bolt spacing, bolt size, and bolt location. The only difference is the markings inside and the internal parts. If one is out of stock you can use the other one unless you have local regulations that require a 1.28gpf toilet. You can install 1.6 or 1.28 parts in this tank, it will work either way.
