The Pro-Series Drain Master Valve Kit 5934
This Kit is one of the three 'Ultimate' Triple kits, and includes everything
to install 3 valves for 3 holding tanks operated from 2 Double Switch Panels
and 1 Single Rocker Style Switch.
Functionally the 5934 kit is the same as that seen on: www.rvtravel.com
but offers 3 valves, 2 Double Switch Panels and 1 Single Switches, IP66
Have 4 tanks on your RV?