The RCMT series are close-coupled self-priming pumps for light to moderate solids (10-15mm). They fill a niche for everyday drainage and wastewater that isn't as chunky as what the RT/RTH handle. They cover smaller sizes (40–80mm) and often are electric-driven. Uses include construction site sump, livestock effluent, or washdown water.

These centrifugal pumps have an open impeller design, and the built-in backflow preventer avoids reverse siphoning when the pump is stopped and assures automatic re-priming at the next start. The pump re-primes itself even if partially filled with liquid and with completely empty suction pipe.