HYD-RTX hydraulic-driven washdown pumps from Water Cannon are designed for portable restroom cleaning. Flow rates range from 3 to 5.5 gpm with pressures from 1,000 to 4,000 psi. The HYD3525, rated at 3.5 gpm at 2,500 psi, can be mounted to most trucks and connected to existing hydraulic systems. The fluid-driven system does not require electrical or gasoline power. 800/333-9274; www.watercannon.com.