Grundfos Pump Corporation (Olathe, KS) has expanded its small multistage centrifugal pump line with the introduction of CR1s, CR1, CR3, and CR5 pumps, which provide new sizes with greater flow range, and flow rates from one half gal/min through 45 gal min. Cartridges are available in flushed seal, double seal, and magnetic drive, operating in temperatures from -40 degrees F to 250 degrees.