The S4T-2 4-inch trash pump from Hydra-Tech Pumps has integral stainless steel wear plates above and below the impeller. It fits into tight spaces and can be used as a submersible pump or a tank truck flange mount for direct loading or off-loading, using onboard truck hydraulics. Requiring only 8 to 10 gpm of hydraulic flow at pressures to 2,500 psi, it can operate with smaller hydraulic power units. It has a cast and machined hardened aluminum volute and a two-vane open-channel impeller. It delivers output flows to 700 gpm, heads to 100 feet and pressure up to 2,000 psi. 570/645-3779; www.hydra-tech.com.