Specifically engineered to handle muddy or sandy water, the ST20-S is powered by a 169cc Subaru engine that pumps up to 158 gpm. With features such as low-oil shut down, custom Easy Prime funnel design for quick and easy priming and a large fuel tank with integrated fuel gauge, it's both durable and easy to use. Generac's clean water, semi-trash and trash water pumps are designed, engineered and manufactured to offer the most reliable water removal solution for homeowners, farmers, construction crews and more. They can resolve water transfer needs from the draining of swimming pools and ponds, to the removal of standing water from basements or farm fields.