Mankato, Minn.-based Coster Engineering, a division of Hiniker Co., presents its C-Series. The RO elements measure 4″ x 40″, and are low energy thin film. It has a 304 stainless steel pressure vessel. It’s programmable with an LED readout. Product and waste flow meters are also available. Other features include a low-pressure cutoff switch, 5 micron sediment filter, inlet feed electric solenoid valve, product reverse flow check valve, and a waste recycle valve.