Liberty Pumps P372LE41 Series Simplex Sewage System, 1 Comes with Liberty's LE41A submersible automatic sewage pump (4/10 horse power and 2-Inch discharge) Pumps up to 129 GPM Maximum discharge head of 19-Foot 41-Gallon capacity for longer pump cycles and increased pump life Comes completely assembled.Larger Basin- 40% more capacity than standard 18" X 30" basins. Results in decreasing switch cycles and improving pump life