Van Air Systems, Inc.
June 2, 2002
The Sentinel Series drain valves fromVan Air Systems, Inc. (Lake City, PA) can operate in programmable modes as well as in response to an optional liquid-level sensor for zero air loss draining. Model MDV-400L features a keypad for timing adjustments and an LCD cycle status readout. Model MDV400I is a basic drain with a power-on LED and test button.