The ESDI Model 110400 four-station water vending machine controller for machines with multiple vend stations has been designed and tested for reliability. Features include three volume selections, one pay station, and 1⁄2-liter to 6-gal vend volumes. It also offers two-valve dispensing with no overflow, timed or metered vending, and UV hot water flush. It includes maximum run time shutdown, DEX/UCS data retrieval and NAMA MDB protocol. The controller conforms to UL-508, and complies with CEI/IEC 1000-4-4 for EMI susceptibility.