The compact S4T 4-inch hydraulic drive submersible trash pump from Hydra-Tech Pumps is designed for versatility with an ability to pass large solids to tackle many jobs, which can range from construction site dewatering to sewage and slurry pumping. It operates with HT15 to HT25 power units, or other hydraulic power sources capable of flows of 10 to 15 gpm. It delivers output flows to 800 gpm, heads to 110 feet and pressure up to 3,000 psi. The safe and variable-speed hydraulic drive can be used where electric power is hazardous or impractical. 570/645-3779; www.hydra-tech.com.