This is a replacement pressure-assisted flush tank unit, model B8204. It's designed to fit specific Gerber and Project Source toilets that use a 1.0 Gallons Per Flush (GPF) pressure-assisted system. This is a LEFT-HAND unit (if you need the right-hand version, you'd order model B8106-06R). These systems use compressed air to create a very powerful, efficient flush while saving a lot of water. Please note: this is for the tank internals/system only. The tank-to-bowl gasket that comes with it may not fit all Gerber porcelain bowls, so you might need to source the correct gasket separately. A great DIY solution for fixing a weak flush or replacing a noisy, old pressure-assist unit in your toilet.
