Gerber Plumbing Fixtures’ Avalanche 1.28 high-efficiency toilet is the company’s most powerful single-flush, gravity-fed model. Using only 1.28 gpf, the toilet features a 3-inch flush valve enhanced with a Fluidmaster fill valve. The toilet’s dual-fed siphon jet is larger than conventional models, allowing for rapid and effective bowl evacuation. The Avalanche combines performance and aesthetics with a slimline tank and side-mounted trip lever, with color availability in white, bone and biscuit.