(WD-1) Water Detector for Hydro-X & Aqua-X SystemOverview TrolMaster's WD 1 water detector can be used in one of two ways. First, it can be used to simply monitor the floor or space for water as a leak detector. The other way the WD 1 can be used is as a water verification monitor. When used in this way, the water detector is placed where runoff will accumulate (or where water is being introduced to the growing medium). Each output (solenoid or pump) on the Hydro X Aqua X can be assigned to a