Stanley Hydraulic Tools offers a range of hydraulically driven pumps, including dewatering and trash pumps. The model SM50 dewatering pump, for example, with 3-inch ports, weighs 21 pounds, can fit in a space only 11 inches deep and 10 inches square, and has an output capacity of up to 500 gpm. In the trash-pump line, the model TP08 has a discharge capacity of 800 gpm and uses a 4-inch inlet diameter. The TP08, weighing 59 pounds, is designed to pump high volumes of water, sand slurries, sludge and solids up to 3 inches in diameter. The pump uses approximately 9 gpm of hydraulic flow.