A peristaltic metering pump moves chemical by compressing a flexible tube between rotating rollers and a fixed housing, pushing fluid forward through the tube in a continuous squeezing motion rather than drawing it through check valves the way diaphragm and plunger pumps do. Because the only wetted part is the tube itself, there’s nothing inside the pump for abrasive, viscous, or solids-laden chemicals to damage, and no check valves to clog or stick, which makes this design well suited to dosing slurries, polymers, and other fluids that would quickly wear out valve-based pump technology. Maintenance consists of periodically replacing the tube, a task that takes minutes and requires no realignment or recalibration of the rest of the pump.