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Drain Master 12VDC electric waste valve provides a positive, more sanitary method of emptying RV holding tanks. Manual, hard to reach, dirty and difficult to operate waste valves are now virtually obsolete. Drain Master requires only the simple flip of a switch to open or close waste valves when emptying the holding tanks. Drain Master is more reliable over time, placing no stress on attached plumbing and uses the same amount of pressure each time it is operated.Compact design allows RV manufacturers significantly more flexibility when designing holding tank location and valve placement. Drain Master incorporates a constant torque clutch preventing the possibility of gear stripping and features double sided manual override should a loss of power occur. Drain Master was designed with reliability as the top priority.